JP5487939B2 - Image forming method - Google Patents

Description

The present invention relates to an image forming method for forming a multi-color printed matter having the toner image to the plurality of toner holding layer laminated on the image supporting substrate on with different colors toner particles to each other is held.

  In recent years, energy saving has been studied in various fields from the viewpoint of prevention of global warming, and even in an electrophotographic image forming method, a method of reducing energy at fixing by only applying pressure without using heat ( For example, a method of reusing an image supporting substrate (for example, see Patent Document 2) has been proposed.

  However, these methods have a problem that the toner particles cannot be reused because the toner particles are irreversibly deformed.

  In order to improve such a problem, a method has been proposed in which a concave portion is provided on the surface of the image supporting substrate, and toner particles are electrostatically adhered and fixed therein (for example, see Patent Document 3). ).

  However, depending on the method of providing the concave portion, the toner particles are inevitably detached from the concave portion, resulting in contamination with the detached toner particles, and a minute step is formed between the image portion and the non-image portion. Therefore, there is a problem that high image quality cannot be obtained.

  In addition, according to the above-described method, when obtaining a multicolor print product, it is difficult to separate the toner particles of each color, and therefore, there is a problem that the toner particles cannot be reused as the toner particles of each color. .

JP-A-6-242627 JP 2003-5435 A Japanese Patent No. 4085505

The present invention has been made based on the above circumstances, and an object of the present invention is an image forming method for obtaining a multicolor print, which is a multicolor print formed while achieving energy saving. An object of the present invention is to provide an image forming method capable of obtaining high image quality.

In the image forming method of the present invention, a first monochromatic color obtained by holding a toner image formed of toner particles containing at least a colorant on an image supporting substrate in a translucent toner holding material layer. An image layer and a second monochrome image layer are laminated,
The first single-color image layer and the second single-color image layer are formed from a multicolor print product in which toner images formed by toner particles containing colorants of different colors are held .
An image forming method for obtaining a multicolor print using toner particles separated by a separation process,
The separation process separates the multicolor printed material into an image supporting base material and each single color image layer, and the single color image layer is dissolved into a solution for dissolving the toner holding material layer and not dissolving the toner particles. The toner holding material layer is dissolved in the substrate to dissolve the toner particles, and the toner particles are collected.

In the image forming method of the present invention, a toner image formed by toner particles containing at least a colorant is held on the image supporting substrate in a translucent toner holding material layer. A monochrome image layer, a second monochrome image layer, a third monochrome image layer, and a fourth monochrome image layer,
The first monochrome image layer, the second monochrome image layer, the third monochrome image layer, and the fourth monochrome image layer hold toner images formed by toner particles containing colorants of different colors. From a multicolored print
An image forming method for obtaining a multicolor print using toner particles separated by a separation process,
The separation process separates the multicolor printed material into an image supporting base material and each single color image layer, and the single color image layer is dissolved into a solution for dissolving the toner holding material layer and not dissolving the toner particles. The toner holding material layer is dissolved in the substrate to dissolve the toner particles, and the toner particles are collected.

In the image forming method of the present invention, the surface of the multicolor printed material can be coated with a surface protective material.

In the image forming method of the present invention, stacked on images supporting substrate, a toner formed by the toner particle image containing at least a colorant is held in the toner holding layer of the light-transmitting A monochromatic image layer laminating step is performed in which a similar second monochromatic image layer is laminated on a single monochromatic image layer with toner particles containing a colorant having a color different from that of the toner particles forming the first monochromatic image layer. It is preferable.

In the image forming method of the present invention, the monochromatic image layer laminating step is preferably performed by any of the following means (1) to (3).
(1) Means for obtaining a second monochrome image layer in which a toner image is held in a toner holding material layer , and laminating the second monochrome image layer on the first monochrome image layer.
(2) the toner holding layer formed on the first single-color image layer, means for holding the toner image to the toner holding layer.
(3) to the first single-color image layer, a toner image formed by toner particles, means for holding the toner image to the toner holding layer by superimposing the toner holding layer on the toner image.

  In the image forming method of the present invention, a second monochrome image layer can be formed on the first monochrome image layer via an interlayer separator.

In the image forming method of the present invention, a first toner image formed by toner particles each containing at least a colorant on an image supporting substrate is held in a translucent toner holding material layer. A monochromatic image layer and a second monochromatic image layer are laminated, and the first monochromatic image layer and the second monochromatic image layer hold toner images formed by toner particles containing colorants of different colors. It is preferable to obtain a multicolor print using an image supporting substrate separated from the multicolor print formed in this way .

The image forming method of the present invention is formed on the image supporting substrate on a first single color at least a colorant toner image formed by toner particles containing is by holding the transparent toner holding layer A monochromatic image layer laminating step for forming a similar second monochromatic image layer with toner particles containing a colorant having a different color from the toner particles forming the first monochromatic image layer on the image layer,
The monochromatic image layer laminating step is an image forming method performed by any of the following means (1) to (3):
A first monochromatic image in which the image supporting substrate is formed by holding a toner image formed of toner particles containing at least a colorant on the image supporting substrate in a translucent toner holding material layer. And the first monochrome image layer and the second monochrome image layer hold toner images formed by toner particles containing colorants of different colors. It is what was isolate | separated by passing through a separation process from the multicolor printed matter which becomes .
(1) Means for obtaining a second monochrome image layer in which a toner image is held in a toner holding material layer , and laminating the second monochrome image layer on the first monochrome image layer.
(2) the toner holding layer formed on the first single-color image layer, means for holding the toner image to the toner holding layer.
(3) to the first single-color image layer, a toner image formed by toner particles, means for holding the toner image to the toner holding layer by superimposing the toner holding layer on the toner image.

In the image forming method of the present invention, a first monochromatic color obtained by holding a toner image formed of toner particles containing at least a colorant on an image supporting substrate in a translucent toner holding material layer. An image layer and a second monochrome image layer are laminated,
The first single-color image layer and the second single-color image layer are formed from a multicolor print product in which toner images formed by toner particles containing colorants of different colors are held.
An image forming method for obtaining a multicolor print using a toner holding material layer obtained by a toner holding material that forms a toner holding material layer separated by undergoing a separation process,
The separation process separates the multicolor print into an image supporting substrate and each single color image layer, and converts any single color image layer into a dissolution processing solution in which the toner holding material layer is dissolved and the toner particles are not dissolved. It is performed by immersing to dissolve the toner holding material layer and removing the toner particles .

In the image forming method of the present invention, a first monochromatic color obtained by holding a toner image formed of toner particles containing at least a colorant on an image supporting substrate in a translucent toner holding material layer. An image layer, a second monochrome image layer, a third monochrome image layer, and a fourth monochrome image layer are laminated,
The first monochrome image layer, the second monochrome image layer, the third monochrome image layer, and the fourth monochrome image layer hold toner images formed by toner particles containing colorants of different colors. From a multicolored print
An image forming method for obtaining a multicolor print using a toner holding material layer obtained by a toner holding material that forms a toner holding material layer separated by undergoing a separation process,
The separation process separates the multicolor print into an image supporting substrate and each single color image layer, and converts any single color image layer into a dissolution processing solution in which the toner holding material layer is dissolved and the toner particles are not dissolved. It is performed by immersing to dissolve the toner holding material layer and removing the toner particles.

In the image forming method of the present invention, the first monochromatic color is formed by holding a toner image formed of toner particles containing at least a colorant on an image supporting substrate on a translucent toner holding material layer. A monochromatic image layer laminating step for forming a similar second monochromatic image layer with toner particles containing a colorant having a different color from the toner particles forming the first monochromatic image layer on the image layer,
The monochromatic image layer laminating step is performed by any one of the following means (1) to (3) .
(1) Means for obtaining a second monochrome image layer in which a toner image is held in a toner holding material layer , and laminating the second monochrome image layer on the first monochrome image layer.
(2) the toner holding layer formed on the first single-color image layer, means for holding the toner image to the toner holding layer.
(3) to the first single-color image layer, a toner image formed by toner particles, means for holding the toner image to the toner holding layer by superimposing the toner holding layer on the toner image.

In the image forming method of the present invention, it is preferable that the toner particles constituting any one of the monochrome image layers are toner particles separated by the separation process .

  According to the multicolor printed material of the present invention, since the toner image is held on the toner holding material layer, the surface of the obtained multicolor printed material is in a highly uniform state, and between the image portion and the non-image portion. The difference in height level is suppressed to a small level, so that high image quality can be obtained.

  Further, according to the image forming method of the present invention, basically, each toner image can be fixed to the image supporting substrate without applying heat, so that energy saving can be achieved. Since the image is held on the toner holding material layer, the surface of the obtained multicolor print is in a highly uniform state, and the difference in height level between the image portion and the non-image portion is suppressed to a small level, and therefore high. A multicolor print having image quality can be obtained.

  Further, according to the method of reusing the toner particles and / or the image supporting substrate of each color separated from the obtained multicolor printed matter, great energy saving is achieved as a whole.

It is a schematic diagram which shows an example of the form of the multicolor printed material of this invention. It is a schematic diagram which shows another example of the form of the multicolor printed material of this invention. It is a schematic diagram which shows another example of the form of the multicolor printed material of this invention. 1A and 1B are schematic diagrams for explaining an example of an image forming method of the present invention, in which FIG. 1A is a diagram illustrating a state where a toner image related to a first monochrome image layer is formed on a photoconductor, and FIG. The figure which shows the state in which the 1st monochrome image layer was carry | supported on the intermediate transfer body, (c) is a figure which shows the state in which the 1st monochrome image layer was laminated | stacked on the image support base material, (d) is an intermediate | middle. The figure which shows the state with which the 2nd monochrome image layer was carry | supported on the transfer body, (e) is the state which laminated | stacked and fixed the 1st monochrome image layer and the 2nd monochrome image layer on the image support base material. FIG. FIG. 6 is a schematic diagram for explaining another example of the image forming method of the present invention, in which (a) is a diagram showing a state in which a toner image related to the first monochromatic image layer is formed on the photoreceptor; ) Is a diagram showing a state in which the first monochromatic image layer is laminated on the image supporting substrate, and (c) is a diagram showing a state in which the toner image related to the second monochromatic image layer is formed on the photoreceptor. (D) is a view showing a state in which a first monochrome image layer and a second monochrome image layer are laminated and fixed on an image supporting substrate. FIG. 6 is a schematic diagram for explaining still another example of the image forming method of the present invention, where (a) is a diagram showing a state in which a toner image related to the first monochromatic image layer is formed on the photoreceptor; FIG. 4B is a diagram illustrating a state in which a toner image related to the first monochrome image layer is formed on the image supporting substrate, and FIG. 5C is a diagram illustrating a state in which an interlayer separating material supporting the toner holding material layer is superimposed. FIGS. 5A and 5D are diagrams illustrating a state in which a toner image related to the second monochrome image layer is formed on the photoconductor, and FIG. 5E is a toner image related to the second monochrome image layer on the first monochrome image layer. FIG. 5F is a diagram illustrating a state in which the first monochrome image layer and the second monochrome image layer are stacked and fixed on the image supporting substrate.

  Hereinafter, the image forming method of the present invention will be described in detail.

<Multicolor prints>
The multicolor printed material of the present invention is a first monochromatic color obtained by holding a toner image formed of toner particles containing at least a colorant on an image supporting substrate on a translucent toner holding material layer. The image layer and the second single-color image layer are laminated, and the first single-color image layer and the second single-color image layer hold toner images formed by toner particles containing colorants of different colors. It will be.

  The multicolor printed material of the present invention may be a laminate of three or more monochromatic image layers. The number of single color image layers in this multicolor printed material is necessary for obtaining a desired image, for example. The number of colors of the toner particles is the same.

  Further, the combination of toner particle colors in the multicolor printed material is not particularly limited, and generally includes a combination of black, cyan, magenta, and yellow.

  Specifically, for example, as shown in FIG. 1, a toner image Ta formed of toner particles containing, for example, a black colorant is held on a toner holding material layer 15a on an image support base 11. A monochrome image layer 17a formed by toner particles Tb formed of toner particles containing at least a cyan colorant, for example, and a toner holding material layer 15b, and at least a magenta colorant, for example. A toner image Tc formed by toner particles containing toner and a toner image Td formed by toner particles containing at least a yellow colorant, for example, A monochromatic image layer 17d held by the holding material layer 15d is laminated in this order to form a multicolor printed matter P.

  In the toner image Td held on the toner holding material layer 15d, at least all the toner particles constituting the toner image Td are buried in the toner holding material layer 15d by 85% by volume or more as shown in FIG. As shown in FIG. 1, it is preferable that 100% by volume of all the toner particles are buried. Similarly, in the toner holding material layer 15a to the toner holding material layer 15c, all the toner particles constituting them are embedded in the respective toner holding material layers in an amount of 85% by volume or more. Each of them is preferably buried by 100% by volume.

(Image support substrate)
As the image supporting substrate 11 constituting the multicolor printed product P of the present invention, an appropriate one can be used, for example, coating of plain paper, fine paper, art paper or coated paper from thin paper to thick paper. Examples thereof include various types of printed paper, commercially available Japanese paper and postcard paper, polypropylene synthetic paper, polyethylene terephthalate (PET) film, polyethylene naphthalate (PEN) film, polyimide film, and cloth.
Among these, those having a high strength, whose performance is not impaired even if the reuse through the separation process described later is repeated many times, for example, 10 times or more, are particularly preferable, and such reuse can be repeated many times. Preferred examples of the image supporting substrate 11 include plain plain paper (thick paper), art paper, coated paper, polyethylene terephthalate (PET) film, polyethylene naphthalate (PEN) film, and polyimide film.

[Toner retention material layer]
The toner holding material layers 15a to 15d constituting the multicolor printed product P of the present invention may be made of the same toner holding material, or may be made of different toner holding materials.

  In addition, the toner holding material layers 15a to 15d have a state (hereinafter, also referred to as “interface presence state”) that can be peeled off without being compatible even in a state of being in contact with each other. Specifically, the adhesive force at the interface between the image support base material 11 and the toner holding material layer 15a is Fa, the adhesive force at the interface between the toner holding material layer 15a and the toner holding material layer 15b is Fb, and the toner holding material layer. Assuming that Fc is an adhesive force at the interface between the toner holding material layer 15c and the toner holding material layer 15c, Fd is an adhesive force at the interface between the toner holding material layer 15c and the toner holding material layer 15d, and Fi> Fa> Fb. = Fc = Fd or Fi> Fa> Fb ≧ Fc ≧ Fd or Fi> Fa> Fb = Fc ≧ Fd or Fi> Fa> Fb ≧ Fc = Fd.

The interface existing states in the toner holding material layers 15a to 15d can be obtained by performing an appropriate adhesion preventing process when the toner holding material layers 15a to 15d are formed.
Specifically, when the toner holding material layers 15a to 15d are formed by, for example, applying a toner holding material having fluidity to a target body, the adhesion preventing treatment is dried in a state of contact with air after application. It is done by things. Although the detailed principle of obtaining the interface existence state by drying the fluid holding toner holding material in contact with air after application is not clear, the end of the toner holding material by contacting with air is not clarified. It is presumed that the reactivity of the surfaces of the toner holding material layers 15a to 15d to be formed is reduced by blocking the groups.
As described above, since the toner holding material layers 15a to 15d have the interface existing state, they can be easily peeled in the peeling processing of the toner holding material layers 15a to 15d in the separation processing described later.

  In addition, when the toner holding material layers 15a to 15d do not have an interface existing state, interlayer separation materials 16a to 16c described later are provided between the monochrome image layers 17a to 17d related to the toner holding material layers 15a to 15d, respectively. What is necessary is just to be inserted.

The toner holding material layers 15a to 15d constituting the multicolor printed product P of the present invention do not have fluidity in a state where no external force is applied, and toner holding which develops a fluid state when the external force is applied. It is preferable that it consists of material. Specifically, for example, it can be made of a toner holding material having a thixotropic property that is in a gel state in a normal state and changes into a sol state by applying an external force.
In particular, the toner holding material has fluidity (hereinafter, also referred to as “specific fluidity”) such that when the toner particles are buried by an external force, the degree of change in the particle shape is suppressed to a small level. It is preferable.
The specific fluidity specifically refers to a material having a penetration of 30 or more measured according to JIS K2207 in a state where an external force for embedding toner particles is applied. As the holding material, the higher the penetration, the better.
According to the toner holding material layers 15a to 15d made of the toner holding material having the specific fluidity, each toner particle is electrostatically attached to the photoreceptor K in the image forming method described later. The toner images Ta to Td can be embedded in the toner holding material layers 15a to 15d in a state where the electrostatic charge in each toner particle is maintained.

  In the image forming method to be described later, the external force for burying the toner particles in the toner holding material layers 15a to 15d is, for example, an electrostatic force applied by an appropriate transfer device, or the image support on the toner images Ta to Td on the photoreceptor K. Examples thereof include a pressing force with which the laminated body in which the toner holding material layers 15a to 15d are formed on the substrate 11 is pressed, and a combination thereof.

  In addition, as the toner holding material for forming the toner holding material layers 15a to 15d, if the toner holding material is a light-transmitting material and the toner particles contain a resin, the resin ( Hereinafter, materials that are incompatible with “toner resin”) can be selected as appropriate, and materials having high affinity with toner particles are preferable.

  As the toner holding material for forming the toner holding material layers 15a to 15d, in particular, a toner holding material obtained through a separation process described later is used for the formation of another multicolor printed material using an image forming material. A material that can be reused as a material for forming the toner holding material layer is preferable.

Examples of the toner holding material for forming the toner holding material layers 15a to 15d include silicone-based, acrylic-based, vinyl-based, urethane-based resins, elastomers and rubbers, and gels and sols thereof with organic solvents and oils, Water-based emulsions, water-soluble polymers, and gels and sols of these and water-based solvents can be used.
Specifically, the silicone resins include dimethylsiloxane, diphenylsiloxane, methylvinylsiloxane, methylphenylsiloxane, fluorosiloxane, trifluorosiloxane, trifluoropropylsiloxane, chloromethylsiloxane, cyanoethylsiloxane, polyether siloxane, fluoro Examples thereof include polyether siloxane and aminosiloxane.
Examples of acrylic resins include 2-ethylhexyl acrylate and n-butyl acrylate, methyl acrylate, ethyl acrylate, methyl methacrylate, acrylic acid, methacrylic acid, itaconic acid, acrylamide derivatives, hydroxyethyl acrylate, and glycidyl acrylate. Examples include polymers.
Examples of vinyl resins include polyvinyl acetate, ethylene-vinyl acetate copolymer, acrylic-vinyl acetate copolymer, polyvinyl acetal, polyvinyl butyral, phenol-vinyl butyral copolymer, polyvinyl pyrrolidone, and polyvinyl chloride. Is mentioned.
Examples of urethane resins include polyurethane prepolymers obtained by reacting polyols and polyisocyanates. Examples of polyols include 1,2-polybutadiene polyol, 1,4-polybutadiene polyol, and poly (pentadiene / butadiene) polyol. , Poly (butadiene / styrene) polyol, poly (butadiene / acrylonitrile) polyol, etc., and polyisocyanates include diphenylmethane diisocyanate, tolylene diisocyanate, naphthalene diisocyanate, polymethylene polyphenyl isocyanate, xylylene diisocyanate, lysine diisocyanate, hexamethylene. Diisocyanate, isophorone diisocyanate, methylene bis (cyclohexyl isocyanate), etc.
Further, as water-soluble polymers, natural polymer polysaccharides such as xanthan gum, carrageenan, pullulan, furseleran, curdlan, gelatin, collagen, etc .; sodium alginate, calcium alginate natural low molecular polysaccharide; polyacrylic acid; sodium polyacrylate A mixture of polyvinyl alcohol and the like with a solvent such as water, methyl alcohol, ethyl alcohol, ethylene glycol, propylene glycol, polyethylene glycol, and glycerin;

  The thickness of the toner holding material layers 15a to 15d is set in relation to the thickness of the toner images Ta to Td to be held, for example, 1 to 500 μm.

In the multicolor printed matter P as described above, as shown in FIG. 3, interlayer separators 16a to 16c may be interposed between adjacent monochrome image layers.
The interlayer separators 16a to 16c are not particularly limited as long as they have translucency, have a composition different from that of the toner holding material forming the toner holding material layers 15a to 15d, and have an interface existing state. Specifically, organic solvent-soluble resins such as polystyrene resin, acrylic resin, and polyester resin, photocuring agents, thermosetting agents, moisture curing agents, and the like can be given.
The interlayer separators 16a to 16c made of such materials hold the toner images Ta to Tc on the toner holding material layers 15a to 15c, respectively, and then apply these materials to the surfaces of the toner holding material layers 15a to 15c. It can provide by the method of doing. Further, for example, the above material can be provided by a method in which the material is formed into a sheet and coated on the toner holding material layers 15a to 15c. Specific materials used by molding into a sheet include, for example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP), polystyrene (PS), and the like.

Moreover, in the multicolor printed matter P, the surface may be coat | covered with the surface protection material 16d.
The surface protective material 16d may cover any of the upper and lower surfaces and side surfaces of the multicolor printed material P, but at least the upper surface when the image supporting substrate 11 is provided with the lower surface, specifically Specifically, for example, it is preferable to cover the monochrome image layer 17d positioned at the uppermost layer among the monochrome image layers 17a to 17d.
By providing such a surface protective material 16d, the toner image Td is held even when the toner holding material layer 15d is made of an adhesive toner holding material in a state where no external force is applied. In addition, the toner holding material layer 15d can be stored, and the surface thereof can be additionally written with a pencil or the like.
Examples of the surface protective material 16d include those made of the same materials as those described for the interlayer separators 16a to 16c, and the method of forming the surface separator 16d is a method for forming the interlayer separators 16a to 16c. The same method can be mentioned.

[Toner particles]
The toner particles for forming the toner image of the multicolor printed product of the present invention need only contain at least a colorant. For example, a toner containing at least a resin and a colorant generally used in a copying machine or the like. In addition to these, fine particles made of an inorganic substance or a metal can also be used. Among these, it is particularly preferable to use toner particles containing at least a resin and a colorant in order to facilitate image formation.
The toner particles containing at least a resin and a colorant may further contain a charge control agent, magnetic powder, a release agent, and the like as desired. Such an aggregate of toner particles is hereinafter referred to as toner.
Hereinafter, unused toner particles that are toner particles containing at least a resin (toner resin) and a colorant will be described.

[Method for producing toner particles]
A method for producing such toner particles is not particularly limited, and a pulverization method, an emulsion dispersion method, a suspension polymerization method, a dispersion polymerization method, an emulsion polymerization method, an emulsion polymerization aggregation method, and other known methods. And so on.

[Toner resin]
When the toner particles are produced by a pulverization method, an emulsification dispersion method, etc., as the toner resin, styrene resin, (meth) acrylic resin, styrene- (meth) acrylic copolymer resin, olefin resin, etc. Various known resins such as vinyl resin, polyester resin, polyamide resin, polycarbonate resin, polyether, polyvinyl acetate resin, polysulfone, epoxy resin, polyurethane resin, and urea resin can be used. These can be used alone or in combination of two or more.

  On the other hand, when the toner particles are produced by a suspension polymerization method, a dispersion polymerization method, an emulsion polymerization method, an emulsion polymerization aggregation method, etc., as a polymerizable monomer for obtaining a toner resin, for example, styrene, o-methyl Styrene, m-methylstyrene, p-methylstyrene, α-methylstyrene, p-chlorostyrene, 3,4-dichlorostyrene, p-phenylstyrene, p-ethylstyrene, 2,4-dimethylstyrene, p-tert- Styrene or styrene derivatives such as butyl styrene, pn-hexyl styrene, pn-octyl styrene, pn-nonyl styrene, pn-decyl styrene, pn-dodecyl styrene; methyl methacrylate, methacrylic acid Ethyl, n-butyl methacrylate, isopropyl methacrylate, isobutyl methacrylate, methacrylate Methacrylic acid ester derivatives such as t-butyl acid, n-octyl methacrylate, 2-ethylhexyl methacrylate, stearyl methacrylate, lauryl methacrylate, phenyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoethyl methacrylate; methyl acrylate, Acrylics such as ethyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, isobutyl acrylate, n-octyl acrylate, 2-ethylhexyl acrylate, stearyl acrylate, lauryl acrylate, phenyl acrylate, etc. Acid ester derivatives; olefins such as ethylene, propylene, and isobutylene; vinyl halides such as vinyl chloride, vinylidene chloride, vinyl bromide, vinyl fluoride, and vinylidene fluoride; Vinyl esters such as vinyl pionate, vinyl acetate and vinyl benzoate; vinyl ethers such as vinyl methyl ether and vinyl ethyl ether; vinyl ketones such as vinyl methyl ketone, vinyl ethyl ketone and vinyl hexyl ketone; N-vinyl carbazole, N -N-vinyl compounds such as vinyl indole and N-vinyl pyrrolidone; vinyl compounds such as vinyl naphthalene and vinyl pyridine; vinyl monomers such as acrylic acid or methacrylic acid derivatives such as acrylonitrile, methacrylonitrile and acrylamide Can be mentioned. These vinyl monomers can be used alone or in combination of two or more.

Moreover, it is preferable to use combining what has an ionic dissociation group as a polymerizable monomer. The polymerizable monomer having an ionic dissociation group has, for example, a substituent such as a carboxyl group, a sulfonic acid group, and a phosphoric acid group as a constituent group, and specifically includes acrylic acid, methacrylic acid, maleic acid. Acid, itaconic acid, cinnamic acid, fumaric acid, maleic acid monoalkyl ester, itaconic acid monoalkyl ester, styrene sulfonic acid, allyl sulfosuccinic acid, 2-acrylamido-2-methylpropane sulfonic acid, acid phosphooxyethyl methacrylate And 3-chloro-2-acid phosphooxypropyl methacrylate.
Furthermore, as a polymerizable monomer, divinylbenzene, ethylene glycol dimethacrylate, ethylene glycol diacrylate, diethylene glycol dimethacrylate, diethylene glycol diacrylate, triethylene glycol dimethacrylate, triethylene glycol diacrylate, neopentyl glycol dimethacrylate, neopentyl A resin having a crosslinked structure can also be obtained using polyfunctional vinyls such as glycol diacrylate.

As the toner resin constituting the toner particles used in the image forming method of the present invention, a polymer material such as an elastomer having shape memory can be used.
Examples of the elastomer having shape memory include a cross-linked shape memory elastomer that is physically or chemically cross-linked, and a network-type shape memory elastomer in which a network polymer and a phase change polymer are mixed.
Specific examples of elastomers having shape memory include monomers such as norbornene, styrene, butadiene, isoprene, methyl methacrylate, butyl acrylate, ethylene, propylene, acrylic acid, isofluorone diisocyanate, oxypropylene glycol, and peroxyketals. , Hindered phenol, benzoyl peroxide, 1,4-butanediol, ethylene glycol and other cross-linking agents, polynobornene, polyurethane, polyisoprene, polyethylene, styrene -Cross-linked shape memory polymer such as butadiene copolymer, network polymer such as epoxy resin, phenol resin, acrylic resin, polyester, melanin resin and polycaprolactone, polyvinyl chloride, Polystyrene, polybutylene succinate, polyethylene terephthalate, polybutylene terephthalate, etc. polyphenylenesulfide network shape memory polymer mixed phase transition polymers such as de the like.

Further, as the toner resin constituting the toner particles used in the image forming method of the present invention, for example, an elastic material such as an elastomer having rubber elasticity can be used.
Examples of the elastomer having rubber elasticity include rubbers such as natural rubber and synthetic rubber, and thermoplastic elastomers having an alloy structure of a resin and a rubber that flows at a high temperature but prevents plastic deformation at a normal temperature and gives a reinforcing effect to the rubber. Is mentioned.
Specific examples of the elastomer having rubber elasticity include, for example, natural rubber mainly composed of cis-polyisoprene, natural gutta percha mainly composed of trans-polyisoprene, acrylic acid, butyl acrylate, 1,3-butadiene, 2 -Chloro-1,3-butadiene, acrylonitrile, isoprene, chloroprene, styrene, α-methylstyrene, p-chlorostyrene, isobutylene, hexamethylsiloxane, tetrafluoroethylene, isocyanate, oxypropylene glycol, epihydrin, ethylene, propylene, etc. Acrylic rubber with addition polymerization and copolymerization of monomers; acrylonitrile butadiene rubber, isoprene rubber, urethane rubber, ethylene propylene rubber, epichlorohydrin rubber, chloroprene rubber, silicone rubber, rubber Synthetic rubber such as lenbutadiene rubber, butadiene rubber, fluorine rubber, polyisobutylene rubber, methacrylic acid-butadiene copolymer, acrylic acid-butadiene copolymer, methyl methacrylate-butadiene copolymer, styrene-butadiene copolymer , Styrene-isoprene copolymer, styrene-ethylenebutylene copolymer, styrene-ethylenepropylene copolymer, styrene-isobutylene copolymer, methyl vinyl ketone-butadiene copolymer, olefin-based thermoplastic elastomer (TPO, TPV) , Vinyl chloride thermoplastic elastomer (TPVC), amide thermoplastic elastomer, ester thermoplastic elastomer, urethane thermoplastic elastomer, and the like.

[Colorant]
As the colorant contained in the toner particles, various organic or inorganic pigments as exemplified below can be used.
That is, examples of black pigments include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon, nonmagnetic ferrite, magnetic ferrite, and magnetite.
Yellow pigments include yellow lead, zinc yellow, cadmium yellow, yellow iron oxide, mineral fast yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa Yellow G, Hansa Yellow 10G, Benzidine Yellow G, Benzidine Yellow GR, Examples include quinoline yellow lake, permanent yellow NCG, and tartrazine lake.
Examples of the orange pigment include red chrome yellow, molybdenum orange, permanent orange GTR, pyrazolone orange, vulcan orange, indanthrene brilliant orange RK, benzidine orange G, and indanthrene brilliant orange GK.
Red pigments include quinacridone, bengara, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, risol red, pyrazolone red, watching red, calcium salt, lake red C, lake red D, brilliant carmine 6B, eosin Rake, Rondamin Lake B, Alizarin Lake, Brilliant Carmine 3B and the like.
Examples of purple pigments include manganese purple, fast violet B, and methyl violet lake.
Examples of blue pigments include bitumen, cobalt blue, alkali blue lake, victodia blue lake, metal phthalocyanine blue, metal-free phthalocyanine blue, phthalocyanine blue partially chlorinated, first sky blue, and induslen blue BC.
Examples of the green pigment include chrome green, chromium oxide, pigment green B, micalite green lake, final yellow green G, and the like.
Examples of white pigments include zinc white, titanium oxide, antimony white, and zinc sulfide.
Examples of extender pigments include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white.
These pigments can be used alone or in combination of two or more.

  The addition amount of the colorant is preferably 0.5 to 20 parts by mass, more preferably 2 to 10 parts by mass with respect to 100 parts by mass of the toner resin.

[Magnetic powder]
When the toner particles are configured to contain magnetic powder, for example, magnetite, γ-hematite, or various ferrites can be used as the magnetic powder.
The addition amount of the magnetic powder is preferably 10 to 500 parts by mass, more preferably 20 to 200 parts by mass with respect to 100 parts by mass of the toner resin.

[Charge control agent]
Further, in the case where the toner particles are configured to contain a charge control agent, the charge control agent is not particularly limited as long as it is a substance that can give positive or negative charge by frictional charging, and there are various known ones. Can be used. Specifically, as the positive charge control agent, for example, a nigrosine dye such as “Nigrosine Base EX” (manufactured by Orient Chemical Industries), “quaternary ammonium salt P-51” (manufactured by Orient Chemical Industries), “ Quaternary ammonium salts such as “Copy Charge PX VP435” (manufactured by Hoechst Japan), alkoxylated amines, alkylamides, molybdate chelate pigments, and imidazole compounds such as “PLZ1001” (manufactured by Shikoku Kasei Kogyo Co., Ltd.) Examples of the negative charge control agent include “Bontron S-22” (manufactured by Orient Chemical Industries), “Bontron S-34” (manufactured by Orient Chemical Industries), and “Bontron E-81” (Orient Chemical Industries). Manufactured by Co., Ltd.), “Bontron E-84” (manufactured by Orient Chemical Industry Co., Ltd.), “Spiron Black TRH” Metal complexes such as (Hodogaya Chemical Industries, Ltd.), thioindigo pigments, quaternary ammonium salts such as “Copy Charge NX VP434” (Hoechst Japan), “Bontron E-89” (Orient Chemical Industries) And boron compounds such as “LR147” (manufactured by Nippon Carlit), fluorine compounds such as magnesium fluoride and carbon fluoride, and the like. In addition to the metal complexes used as negative charge control agents, oxycarboxylic acid metal complexes, dicarboxylic acid metal complexes, amino acid metal complexes, diketone metal complexes, diamine metal complexes, azo group-containing benzene-benzene derivatives Those having various structures such as a skeletal metal body and an azo group-containing benzene-naphthalene derivative skeleton metal complex can be used.
As described above, the toner particles are configured to contain the charge control agent, whereby the chargeability of the toner is improved.

  The addition amount of the charge control agent is preferably 0.01 to 30 parts by mass, more preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the toner resin.

〔Release agent〕
Further, when the toner particles are configured to contain a release agent, various known waxes can be used as the release agent. As the wax, it is particularly preferable to use a polyolefin-based wax such as low molecular weight polypropylene, polyethylene, or oxidized polypropylene or polyethylene.

  The addition amount of the release agent is preferably 0.1 to 30 parts by mass, more preferably 1 to 10 parts by mass with respect to 100 parts by mass of the toner resin.

[Particle size of toner particles]
The toner particles preferably have a volume-based median diameter of 3 to 8 μm. When the volume-based median diameter is 3 to 8 μm, the reproducibility of fine lines and high image quality of photographic images can be achieved, and the amount of toner particles consumed is larger than when toner particles with large particles are used. Can be reduced.

  The volume-based median diameter of toner particles is measured and calculated using a measuring device in which a computer system equipped with data processing software “Software V3.51” is connected to “Coulter Multisizer 3” (manufactured by Beckman Coulter). It is what is done. Specifically, 0.02 g of toner is added to 20 mL of a surfactant solution (for example, a surfactant solution in which a neutral detergent containing a surfactant component is diluted 10-fold with pure water for the purpose of dispersing the toner). Then, ultrasonic dispersion was performed for 1 minute to prepare a toner dispersion, and this toner dispersion was placed in a beaker containing “ISOTON II” (manufactured by Beckman Coulter) in a sample stand. Pipette until the indicated concentration is 8%. Here, a reproducible measurement value can be obtained by setting the concentration range. In the measurement apparatus, the measurement particle count is 25000, the aperture diameter is 50 μm, the frequency value is calculated by dividing the measurement range of 1 to 30 μm into 256, and the volume integrated fraction is 50 % Particle diameter is defined as the volume-based median diameter.

[Average circularity of toner particles]
The above toner particles preferably have an average circularity represented by the following formula (S) of 0.700 to 1.000, more preferably 0.850 to 1.000.
Formula (S): Average circularity = circumference of circle obtained from equivalent circle diameter / perimeter of particle projection image

(External additive)
In order to improve fluidity, chargeability, cleaning properties, etc., the toner described above may contain external additives such as a so-called post-treatment fluidizer and cleaning aid added to the toner particles. Good.
As the post-treatment agent, for example, inorganic oxide fine particles composed of silica fine particles, alumina fine particles, titanium oxide fine particles, etc., inorganic stearate compound fine particles such as aluminum stearate fine particles, zinc stearate fine particles, or strontium titanate, titanium Inorganic titanic acid compound fine particles such as zinc acid are listed. These can be used individually by 1 type or in combination of 2 or more types.
These inorganic fine particles are preferably subjected to surface treatment with a silane coupling agent, a titanium coupling agent, a higher fatty acid, silicone oil or the like in order to improve heat-resistant storage stability and environmental stability.
The total amount of these various external additives added is 0.05 to 5 parts by mass, preferably 0.1 to 3 parts by mass with respect to 100 parts by mass of the toner particles. In addition, various external additives may be used in combination.

  According to the above multicolor printed matter, since the toner images Ta to Td are held on the toner holding material layers 15a to 15d, the surface of the obtained multicolor printed matter P becomes highly uniform, and the image portion and A difference in height level between the non-image portion and the non-image portion is suppressed to be small, and thus high image quality is obtained.

<Image forming method>
In the multicolor printed material as described above, the toner image Ta formed on the image supporting substrate 11 and formed of toner particles containing at least a colorant is held on the translucent toner holding material layer 15a. On the single-color image layer 17a (first single-color image layer), the same single-color image layer 17b (second single-color image) is formed by toner particles containing a colorant having a different color from the toner particles forming the single-color image layer 17a. It can be formed through a monochromatic image layer laminating step for forming a layer.
In the case of a multi-color print in which three or more monochromatic image layers are laminated, for example, when the object to be laminated is a monochromatic image layer of the nth layer (n is an integer of 2 or more), (n− 1) It is obtained by repeating the same process as the monochromatic image layer laminating process described above except that the monochromatic image layer of the layer is laminated to obtain a desired number of layers. .

  The toner images Ta to Td as described above are formed on the photosensitive member K by using the toner as described above as a magnetic or non-magnetic one-component developer or by mixing with a carrier as a two-component developer. It can be formed electrically.

  Specifically, the first laminated body in which the monochromatic image layer 17a as the first monochromatic image layer is formed on the image supporting substrate 11 is the following means (1) to (3). Either can be formed.

(1) Means for obtaining a single-color image layer 17a in which the toner image Ta is held on the toner holding material layer 15a as a single unit and laminating the single-color image layer 17a on the image support substrate 11.
Specifically, for example, as shown in FIGS. 4A to 4C, the toner holding material layer 15a stacked and supported on the intermediate transfer member C is electrostatically charged with toner particles on the photosensitive member K. After the toner image Ta thus formed is buried by an external force, the toner holding material layer 15a in a state where the toner image Ta is held is superposed on the image supporting substrate 11 to thereby form the first A laminate is obtained.
In this means, the above-mentioned interlayer separating material can be used as the intermediate transfer member C, and this can be left in the first laminate.

(2) Means for forming the toner holding material layer 15a on the image supporting substrate 11 and holding the toner image Ta on the toner holding material layer 15a.
Specifically, for example, as shown in FIGS. 5A to 5B, the toner holding material layer 15a formed on the image supporting base material 11 is electrostatically charged with toner particles on the photoreceptor K. The first laminated body is obtained by performing a process of directly burying the formed toner image Ta with an external force.

(3) Means for forming a toner image Ta with toner particles on the image supporting substrate 11, and superimposing the toner holding material layer 15a on the toner image Ta to hold the toner image Ta on the toner holding material layer 15a.
Specifically, for example, as shown in FIGS. 6A to 6C, a toner image Ta electrostatically formed with toner particles on the photosensitive member K is transferred onto the image support base 11, Next, a carrier having a toner holding material layer 15a formed on the back surface of the interlayer separating material 16a is superimposed on the toner image Ta so that the toner image Ta and the toner holding material layer 15a are in contact with each other. The first laminate is obtained by burying Ta in the toner holding material layer 15a by an external force.

  Then, in the monochromatic image layer laminating step for laminating the second and subsequent monochromatic image layers, the target for laminating the monochromatic image layer (nth layer) is from the image support base material 11 to the image support base material 11. (N-1) Any of the following means (1) to (3), which is the same as the above means (1) to (3), except that the monochromatic image layer is changed to a laminated body. Is done by.

(1) A single color image layer 17b (17c, 17d) in which the toner image Tb (Tc, Td) is held on the toner holding material layer 15b (15c, 15d) is obtained as a single unit, and this single color image layer 17b (17c, 17d) is obtained. ) On the monochromatic image layer 17a (17b, 17c) of the first laminate.
Specifically, for example, as shown in FIGS. 4D to 4E, a toner image formed of toner particles is formed on the toner holding material layer 15b (15c, 15d) that is stacked and supported on the intermediate transfer member C. After Tb (Tc, Td) is buried by an external force to obtain a single monochrome image layer 17b (17c, 17d), the single monochrome image layer 17b (17c, 17d) is converted into a single color image layer 17a (17b, 17c). The toner images Ta to Td are fixed to the image supporting substrate 11 by laminating them on the surface.

(2) The toner holding material layer 15b (15c, 15d) is formed on the monochrome image layer 17a (17b, 17c) of the first laminate, and the toner image Tb is formed on the toner holding material layer 15b (15c, 15d). Means for holding (Tc, Td).
Specifically, for example, as shown in FIGS. 5C to 5D, the photosensitive member K is applied to the toner holding material layer 15b (15c, 15d) formed on the monochrome image layer 17a (17b, 17c). The toner image Tb (Tc, Td) electrostatically formed on the toner particles is directly buried by an external force to fix the toner images Ta to Td to the image supporting base 11. Is done.

(3) A toner image Tb (Tc, Td) is formed by toner particles on the monochromatic image layer 17a (17b, 17c) of the first laminate, and a toner holding material layer is formed on the toner image Tb (Tc, Td). Means for holding the toner image Tb (Tc, Td) on the toner holding material layer 15b (15c, 15d) by superimposing 15b (15c, 15d).
More specifically, for example, as shown in FIGS. 6D to 6F, a toner image Tb (Tc, Td) electrostatically formed from toner particles on the photosensitive member K is converted into a monochrome image layer 17a ( 17b, 17c), and the toner is held on the back surface of the interlayer separator 16b (16c, surface protective material 16d) on the toner image Tb (Tc, Td). The carrier formed with the material layer 15b (15c, 15d) is superimposed so that the toner image Tb (Tc, Td) and the toner holding material layer 15b (15c, 15d) are in contact with each other, and the toner image Tb ( The toner images Ta to Td are fixed to the image supporting substrate 11 by burying Tc, Td) in the toner holding material layer 15b (15c, 15d) by an external force.

  The fixing of the toner images Ta to Td does not require heating, but may be heat-treated at a low temperature, for example, about 60 to 80 ° C.

In the above, the external force applied to embed the toner images Ta to Td in the toner holding material layers 15a to 15d depends on the mechanical strength of the toner particles constituting the toner forming the toner images Ta to Td and the toner holding material. Although it varies depending on the type of toner holding material constituting the layers 15a to 15d, for example, a pressing force having a magnitude of 1.00 × 10 ^{3 to} 1.00 × 10 ⁸ Pa can be obtained.

  According to the above image forming method, basically, the toner images Ta to Td can be fixed to the image supporting substrate 11 without applying heat, so that energy saving can be achieved. Since the toner images Ta to Td are held on the toner holding material layers 15a to 15d, the surface of the obtained multicolor print P is in a highly uniform state, and the height level between the image portion and the non-image portion is high. The difference is suppressed to a small level, and therefore a multicolor printed product P having high image quality can be obtained.

[Recycling system]
From the multi-color print P obtained by the above image forming method, the toner particles of each color are separated separately through a separation process, and the toner containing the toner particles of each color (hereinafter, “reuse toner”). It is also preferred that a multicolor printed material can be obtained by being reused as an image forming material. Although the kind of the specific image forming method is not limited, it is particularly preferable that the method is used for the specific image forming method described above.
From the multicolor print P, at least one color toner particle among the toner particles of each color related to the single color image layers 17a to 17d constituting the multicolor print P may be separated. It is preferred that the particles are separated separately.
In addition, at least one color reuse toner is reused among toners for reuse of each color by toner particles (hereinafter also referred to as “separated toner particles”) separated from the multicolor printed product P in the separation process. However, it is preferable that all color reuse toners are reused.
By alternately repeating the above-described specific image forming method and the separation process of the toner particles of each color and / or the image supporting substrate, a recycling system that achieves energy saving can be obtained.

When the separated toner particles of each color are those in which the toner according to the present invention contains an external additive, the toner can be obtained in a state where the external additive remaining without being detached by a separation process or the like is attached. Then, for example, a toner for reuse of each color can be obtained by adding a shortage of external additive up to a predetermined amount to the separated toner particles of each color.
For example, when the separated toner particles are manufactured using a material having shape memory properties as a toner resin and the shape thereof is deformed, the shape is restored to the recovered deformed toner particles. The toner for reuse can be obtained by performing a separation process for performing an appropriate restoration process.

[Reuse toner]
The collected toner particles for reuse can be used in an image forming method for the next cycle by adding, for example, a decrease in external additive described later.

[Quantification of external additives in reusable toner]
The external additive attached to the separated toner particles can be quantified by, for example, a fluorescent X-ray analyzer. Specifically, it can be measured by a fluorescent X-ray analyzer “XRF-1700” (manufactured by Shimadzu Corporation).

Contains the energy required for forming the multicolor print P (N) of the multicolor print P (N) obtained using the toner particles of each color granulated from the raw material, and the separated toner particles as described above. The difference between the energy required for forming the multicolor print P (R) and the multicolor print P (R) obtained by using the reusable toner of each color is substantially different from the toner particles of each color. From the initial granulation energy required for granulation from raw materials, a subtotal of energy related to separation processing and energy related to addition of a shortage of external additives (hereinafter referred to as “processing energy related to reuse”). It is the size drawn.
Since the processing energy related to reuse is extremely small compared to the initial granulation energy, a large energy saving is achieved.

In the recycling system, an image supporting substrate is separated from one multicolor printed matter P through a separation process, and the separated image supporting substrate (hereinafter referred to as “reusable image supporting substrate”). Is also reused as an image forming material. In particular, it is preferably used for the specific image forming method described above. In this recycling system, it is preferable that the image supporting substrate is reused 10 times or more from the viewpoint of energy saving.
As will be described later in the separation process, the reusable image supporting substrate removes the separation treatment liquid as it is when the toner holding material layer holding the toner image is peeled off, and when it is immersed in the separation treatment liquid. Can be obtained.

The energy required for the formation of the multicolor print P (N) obtained using the initial image supporting substrate manufactured from the raw material, and the recycle recovered as described above. The difference between the energy required for forming the multicolor printed material P (R) of the multicolor printed material P (R) obtained using the image supporting substrate for use is substantially the same as the initial image supporting substrate. This is a size obtained by subtracting the energy related to the separation process from the initial production energy required for producing the material from the raw material.
Since the energy related to the separation process is extremely small compared with the initial production energy, a large energy saving is achieved.

Further, in the recycling system, the toner holding material layers 15a to 15d of the single-color image layers 17a to 17d or the toner holding material layers 15a to 15d are formed from one multicolor printed matter P through separation processing. The toner holding material is separated, and the separated toner holding material layers 15a to 15d or the separated toner holding material (hereinafter, also referred to as “separated toner holding material”) is reused as an image forming material and newly added. It is preferable that a toner holding material layer (hereinafter also referred to as “reusable toner holding material layer”) is formed and used in the specific image forming method.
When the toner holding material layers 15a to 15d are immersed in the separation processing liquid described later in the separation process, the reuse toner holding material layer removes the separation processing liquid from the separation processing liquid solution of the collected toner holding material. It is obtained by obtaining a separated toner holding material and forming a layer on the image supporting substrate. Further, in the separation process, when the toner holding material layers 15a to 15d are immersed in the separation processing liquid and swell, the toner holding material layer for reuse can be obtained by removing the separation processing liquid. Further, when removing the toner particles by applying a magnetic force, the solid toner holding material layer from which the toner particles have been removed is melted and used to form a layer on the image supporting substrate, or By leaving the solid toner holding material layer from which the toner particles have been removed, a reusable toner holding material layer can be obtained.

[Separation process]
As a method for separating the image forming material from the multicolor print P obtained by the image forming method of the present invention, for example, the single color image layers 17a to 17d holding the toner images Ta to Td from the multicolor print P are used. Each of the monochrome image layers 17a to 17d can be dissolved or swollen by the toner holding material constituting the toner holding material layers 15a to 15d, and the toner particles cannot be dissolved. The method of immersing in a separation processing liquid can be mentioned.
Specifically, first, the toner holding material layer 15a can be dissolved or swelled, and the monochromatic image layer 17a is immersed in a separation treatment solution that does not dissolve the toner particles to dissolve or swell, and then centrifuged. The precipitated toner particles and the separation treatment solution in which the toner holding material layer 15a is dissolved or the swelling body of the toner holding material layer 15a are collected. Subsequently, similarly, the toner particles related to the monochrome image layer 17b and the separation treatment solution in which the toner holding material layer 15b is dissolved or the swelling body of the toner holding material layer 15b are respectively collected. The toner particles according to 17c, the separation processing solution in which the toner holding material layer 15c is dissolved, or the swelling body of the toner holding material layer 15c are respectively collected, and similarly, the toner particles according to the monochrome image layer 17d and the toner holding material are retained. The separation processing solution in which the material layer 15d is dissolved or the swollen body of the toner holding material layer 15d is collected, whereby the toner particles of each color are separated and collected, and the toner holding material layers related to the single color image layers 17a to 17d. Separation treatment liquid in which 15a to 15d is dissolved or a swelling body of the toner holding material layers 15a to 15d is separated and recovered, and the multicolor print P Can image supporting substrate 11 is recovered left by peeling the color image layer 17a to 17d.
Further, for example, the multi-color printed product P itself can be dissolved or swollen with the toner holding material constituting the toner holding material layers 15a to 15d, and the toner particles and the image supporting base material 11 are not dissolved. The method of immersing can also be mentioned.

  Further, for example, when the toner particles of each color are used as the separation processing method, the surface on which the toner holding material layers 15a to 15d of the image supporting substrate 11 are formed on the multicolor printed material P. The toner holding material layer 15d of the monochromatic image layer 17d is peeled off while applying a magnetic force from the surface opposite to the surface (the lower surface in FIG. 1) so that only the toner image Td remains on the laminate, and then the action of the magnetic force The toner particles constituting the toner image Td related to the monochromatic image layer 17d are separated and collected, and this operation is repeated, whereby the toner particles of the respective colors related to the toner images Ta to Td and the toner holding material layers 15a to 15d By separating and collecting 15d, and separating them, the image supporting substrate 11 can be left and collected.

In the separation process of the single color image layers 17a to 17d or the toner holding material layers 15a to 15d in the separation process, an adhesive tape or the like is attached to the surface of the single color image layers 17a to 17d or the toner holding material layers 15a to 15d. The monochromatic image layers 17a to 17d or the toner holding material layers 15a to 15d to which the adhesive tape has been applied are each pulled by pulling in the peeling direction, that is, the direction opposite to the image supporting substrate 11 with an appropriate force. Each layer can be peeled off.
In the peeling process, the starting point of peeling may be created by hitting, for example, a wedge on the interface between the toner holding material layers 15a to 15d that are in contact with each other.

For example, when the interlayer separators 16a to 16c are inserted between two layers of the monochromatic image layers 17a to 17d in the multicolor printed matter P, the interlayer separators 16c (16b and 16a) are used as the toner holding material layer. The monochromatic image layers 17d, 17c, and 17b can be easily removed from the image supporting substrate 11 by pulling in the peeling direction with a force larger than the adhesive force at the interface between 15c (15b, 15a) and the interlayer separator 16c (16b, 16a). Can be peeled off.
Furthermore, the interlayer separators 16a to 16c are inserted between the two layers of the monochromatic image layers 17a to 17d in the multicolor printed product P, and the surface protective material 16d is provided on the monochromatic image layer 17d, and Adhesive force F (upper) at the interface between the monochrome image layer 17d (17c, 17b, 17a) and the surface protective material 16d (interlayer separators 16c, 16b, 16a) located above the monochromatic image layer 17d (positioned below) When the adhesive force F (lower) at the interface with the interlayer separator 16c (16b, 16a, image support base material 11) to be satisfied is F (upper)> F (lower), F (upper)> F (x The monochromatic image layers 17d, 17c, 17b, and 17a can be peeled from the image supporting substrate 11 by pulling in the peeling direction with a force F (x) that satisfies F)> F (below).

[Separation treatment solution]
As the separation treatment liquid, a liquid that does not denature the toner particles and the image supporting substrate 11 can be used.
Specifically, for example, when the toner holding material forming the toner holding material layer 15 is dissolved and swollen in water, for example, water, methyl alcohol, ethyl alcohol, ethylene glycol, propylene glycol, polyethylene glycol, glycerin, And a mixture thereof.
When the toner holding material forming the toner holding material layer 15 is dissolved or swelled in an organic solvent or oil, for example, toluene, xylene, benzene, carbon tetrachloride, methylene chloride, 1,2-dichloroethane, 1, 1,2-trichloroethane, trichloroethylene, chloroform, monochlorobenzene, dichloroethylidene, methyl acetate, ethyl acetate, methyl ethyl ketone, methyl isobutyl ketone, dimethyl silicone oil, methyl phenyl silicone oil, methyl hydrogen silicone oil, amino-modified silicone oil, commercially available Examples of the dissolving agent include “esolv 21RS” (manufactured by Kaneko Chemical Co., Ltd.), “Dynasolve 180”, “Dynasolve 225”, “Dynasolve 711” (hereinafter, “Dynaloy”), but are not particularly limited.
A surfactant or the like may be added to the separation treatment liquid in order to increase the affinity with the toner particles, the toner holding material for forming the toner holding material layer 15, the image supporting base material 11 and the like.

  According to the method of reusing the toner particles of each color and / or the image supporting substrate 11 separated from the obtained multicolor printed material P as described above, great energy saving is achieved as a whole.

  Although the embodiments of the present invention have been specifically described above, the embodiments of the present invention are not limited to the above examples, and various modifications can be made.

  Hereinafter, specific examples of the present invention will be described, but the present invention is not limited thereto.

[Toner Particle Synthesis Example 1Bk]
100 parts by mass of polyester resin (Tg = 61 ° C., Mn = 4,200, Mw / Mn = 5.5), 8 parts by mass of carbon black, 5 parts by mass of polyethylene wax, charge control agent “Bontron E-84” (Orient Chemical) 2 parts by mass) was applied to a melt-kneader to obtain a mixture, which was then applied to a pulverizer and further applied to a classifier, whereby toner particles having a volume average particle size of 7.5 μm and an average circularity of 0.78 [ 1Bk] was obtained.
0.5% by mass of silica fine particles “H-2000” (manufactured by Hoechst Japan) and 1% by mass of titanium dioxide fine particles “T-805” (manufactured by Nippon Aerosil Co., Ltd.) with respect to 100 parts by mass of the toner particles [1Bk]. Was added and processed with a Henschel mixer to obtain toner [1Bk].
In the above, the volume average particle diameter of the toner particles is measured by “Coulter Multisizer” (manufactured by Beckman Coulter), and the average circularity of the toner particles is measured by a flow type particle image measuring device “FPIA-2000” ( This is a value measured using Sysmex Corporation. Further, the shape and particle size of the toner particles did not change depending on the addition of silica fine particles and titanium dioxide fine particles. The same applies to the following.

[Toner Particle Synthesis Example 1Cy]
Toner [1Cy] was obtained in the same manner as in Toner Particle Synthesis Example 1Bk, except that 6 parts by mass of copper phthalocyanine pigment was used instead of 8 parts by mass of carbon black.

[Toner Particle Synthesis Example 1 Mg]
Toner [1Mg] was obtained in the same manner as in Toner Particle Synthesis Example 1Bk, except that 6 parts by mass of quinacridone pigment was used instead of 8 parts by mass of carbon black.

[Toner Particle Synthesis Example 1 Ye]
Toner [1Ye] was obtained in the same manner as in Toner Particle Synthesis Example 1Bk, except that 6 parts by mass of Hansa Yellow G pigment was used instead of 8 parts by mass of carbon black.

[Toner Particle Synthesis Example 2Cy]
(1) Preparation of Colorant Fine Particle Dispersion While stirring a surfactant solution in which 2.5 parts by mass of sodium dodecyl sulfonate was dissolved in 1600 parts by mass of ion-exchanged water, 200 parts by mass of a copper phthalocyanine pigment was gradually added. Then, a colorant fine particle dispersion [2Cy] in which colorant fine particles having a volume average particle diameter of 189 nm are dispersed was prepared by a dispersion treatment using a sand grinder manufactured by Imex Corporation. The volume average particle size of the fine particles in the dispersion was measured by “UPA-150” (manufactured by Nikkiso Co., Ltd.).

(2) Preparation of toner Interface in which 4 parts by mass of sodium dodecylsulfonate was dissolved in 2800 parts by mass of ion-exchanged water in a reaction vessel equipped with a stirrer, a heating / cooling unit, a nitrogen introducing unit, and a raw material / auxiliary charging unit The activator solution was charged, and the internal temperature was raised to 50 ° C. while stirring at a stirring speed of 200 rpm under a nitrogen stream. To this solution, a polymerization initiator solution in which 10 parts by mass of potassium persulfate was dissolved in 400 parts by mass of ion-exchanged water was added. From 1,560 parts by mass of 1,3-butadiene, 120 parts by mass of lauryl methacrylate, and 40 parts by mass of acrylonitrile. The resulting monomer mixture was added dropwise over 90 minutes, followed by polymerization while maintaining heating for 120 minutes to obtain a rubber particle dispersion [GI ′] in which rubber particles [GI] were emulsified and dispersed.
Furthermore, in a reaction vessel equipped with a stirrer, a heating / cooling device, and a raw material / auxiliary charging device, 1300 parts by mass of ion-exchanged water, 790 parts by mass of the above rubber particle dispersion [GI ′], and dispersion of the above colorant fine particles 163 parts by mass of the liquid [2Cy] was charged, and the pH was adjusted to 10 by adding a 5M sodium hydroxide aqueous solution while stirring at a stirring speed of 200 rpm. Next, a solution in which 27 parts by mass of magnesium chloride hexahydrate was dissolved in 27 parts by mass of ion-exchanged water was added, the temperature was raised to 88 ° C., and the particle growth reaction was continued at this temperature. When the particle size of the associated particles becomes 8.7 μm in terms of volume average particle size, a solution in which 67 parts by mass of sodium chloride is dissolved in 270 parts by mass of ion-exchanged water is added to stop particle growth, and further heating The toner particles [2Cy] having a volume average particle size of 8.6 μm were obtained by continuing spheroidizing treatment, then cooling, repeating filtration, washing with water and drying.

  0.5% by mass of silica fine particles “H-2000” (manufactured by Hoechst Japan) and 1% by mass of titanium dioxide fine particles “T-805” (manufactured by Nippon Aerosil Co., Ltd.) with respect to 100 parts by mass of the toner particles [2Cy]. And a toner [2Cy] was obtained by processing with a Henschel mixer.

[Toner Particle Synthesis Example 2 Mg]
Toner Particle Synthesis Example 2 Toner [2Mg] was obtained in the same manner as in the preparation step of the colorant fine particle dispersion of Cy except that quinacridone pigment was used instead of copper phthalocyanine pigment.

[Toner Particle Synthesis Example 2 Ye]
Toner Particle Synthesis Example 2 Toner [2Ye] was obtained in the same manner as in the preparation step of the colorant fine particle dispersion of Cy except that Hansa Yellow G pigment was used instead of copper phthalocyanine pigment.

[Developer Preparation Examples 1 to 4]
Regarding toners [1Bk], [1Cy], [1Mg], [1Ye], [2Cy], [2Mg], and [2Ye], a mass ratio of each of these and a silicon acrylic coat carrier is 6:94. By mixing, developers [1Bk], [1Cy], [1Mg], [1Ye], [2Cy], [2Mg], [2Ye], which are two-component developers, were prepared.

[Example 1]
(Initial multicolor print)
Silicone gel “SE1891H” (manufactured by Dow Corning Toray) (toner holding material) is coated on a transparent PET film [1Bk] with a thickness of 5 μm with a bar coater, and then left in a sunny place and cured by sunlight. Thus, a toner holding material layer sheet [1Bk] having a flexible toner holding material layer [1Bk] having a thickness of 50 μm and a penetration of 45 was produced.
The toner holding material layer sheet [1Bk] was formed on the toner holding material layer [1Bk] by “bizhub C 253” (manufactured by Konica Minolta Business Technologies, Inc.) with the fixing device removed using the developer [1Bk]. After the toner image [1Bk] is transferred, the toner image [1Bk] is held on the toner holding material layer [1Bk] of the toner holding material layer sheet [1Bk] by passing the removed fixing device without heating. Thus, a monochromatic image layer body [1Bk] was produced.
Thereafter, the toner holding material layer sheet [1Bk] holding the toner image [1Bk] is superimposed on the coated paper [1] (image supporting substrate) in a state where the toner holding material layer [1Bk] is in contact with the coated paper [1] (image supporting base material). The 1st laminated body [1Bk] was obtained.

Next, by producing monochromatic image layers [1Cy], [1Mg], [1Ye] in this order on the laminate [1Bk] in the same manner as described above, from the lower layer,
Coated paper [1] (image supporting substrate),
Monochromatic image layer [1Bk], transparent PET film [1Bk] (interlayer separator),
Monochromatic image layer [1Cy], transparent PET film [1Cy] (interlayer separator),
Monochromatic image layer [1Mg], transparent PET film [1Mg] (interlayer separator),
Monochromatic image layer [1Ye], transparent PET film [1Ye] (surface protective material)
A multicolor print [1] obtained by laminating in this order was obtained.
This multicolor print [1] is comparable to the multicolor print obtained by heating and fixing the toner images [1Bk] to [1Ye] by superimposing them in the usual electrophotographic method. It was.

(Separation process)
From this multicolored print [1], the transparent PET film [1Mg] is pulled in the peeling direction to peel off the monochromatic image layer body [1Ye] holding the toner image relating to the developer [1Ye] to separate the separation processing liquid. Transparent PET films [1Ye] and [1Mg] are separated and recovered by immersing them in “esolv 21RS” (manufactured by Kaneko Chemical Co., Ltd.) and applying ultrasonic waves, and then using a centrifuge, toner particles [1Ye And a separation treatment liquid in which silicone gel is dissolved, and toner particles [1Ye] are recovered. Similarly, toner particles [1Mg], [1Cy], and [1Bk] were collected from the monochrome image layer bodies [1Mg], [1Cy], and [1Bk], respectively. The toner particle recovery rate from the multicolor print [1] was 92% in terms of mass.
The amount of the external additive in the toner by the collected toner particles [1Bk], [1Cy], [1Mg], and [1Ye] is determined by quantifying silica fine particles and titanium dioxide fine particles with a fluorescent X-ray analyzer. Reuse toner by measuring, adding insufficient external additives from the initial toner of each color (respective toners [1Bk], [1Cy], [1Mg], [1Ye]) and mixing with a Henschel mixer [1Bk-1], [1Cy-1], [1Mg-1], [1Ye-1] are obtained and further mixed with a carrier to thereby reuse a developer [1Bk-1], [1Cy-1], [1Mg-1] and [1Ye-1] were obtained.
In addition, by recoating the coated paper [1] after the monochromatic image layer [1Ye], [1Mg], [1Cy], [1Bk] has been peeled off from the multicolor print [1], it can be reused. Coated paper [1-2] was obtained.

(Reproduced multicolor prints)
Using this reused coated paper [1-2] and reused developer [1Bk-1], [1Cy-1], [1Mg-1], [1Ye-1] In the same manner as the multicolor print [1], a multicolor print [1-2] was obtained. This multicolor printed product [1-2] had no visual difference in image quality as compared with the initial multicolor printed product [1].

[Example 2]
(Initial multicolor print)
After applying a fluorine-modified silicone gel “SIFEL 8370” (manufactured by Shin-Etsu Chemical Co., Ltd.) on a transparent PET film [2Cy] having a thickness of 5 μm with a bar coater, it is allowed to stand in a sunny place and cured by sunlight. A toner holding material layer sheet [2Cy] having a flexible toner holding material layer [2Cy] having a thickness of 50 μm and a penetration of 45 on a supporting substrate was produced.
The toner image [2Cy] formed by “bizhub C 253” (manufactured by Konica Minolta Business Technologies), from which the fixing device is removed, is transferred onto the toner holding material layer sheet [2Cy] using the developer [2Cy]. After that, the toner image [2Cy] is held on the toner holding material layer [2Cy] of the toner holding material layer sheet [2Cy] by passing the removed fixing device in an unheated state. A layered body [2Cy] was produced.
Thereafter, the toner holding material layer sheet [2Cy] holding the toner image [2Cy] on the paper [2] “J paper” (manufactured by Konica Minolta Business Solutions Co., Ltd.) (image support base material) is replaced with the toner holding material layer [ 2Cy] was superimposed on the contacted state to obtain a first laminate [2Cy].

Next, by producing monochromatic image layers [2Mg] and [2Ye] in this order on the laminate [2Cy] in the same manner as described above, from the lower layer,
Paper [2] (image supporting substrate),
Monochromatic image layer [2Cy], transparent PET film [2Cy] (interlayer separator),
Monochromatic image layer [2Mg], transparent PET film [2Mg] (interlayer separator),
Monochromatic image layer [2Ye], transparent PET film [2Ye] (surface protective material)
A multicolor print [2] obtained by laminating in this order was obtained.
This multicolor print [2] is comparable to the multicolor print obtained by heating and fixing the toner images [2Cy] to [2Ye] by superimposing the toner images [2Cy] to [2Ye] in the usual electrophotographic method. It was.

(Separation process)
From this multicolored print [2], the transparent PET film [2Ye] is pulled in the peeling direction to peel off the monochromatic image layer [2Ye] holding the toner image related to the developer [2Ye] to separate the separation processing liquid. Transparent PET film [2Ye] is separated and recovered by immersing in “esolv 21RS” (manufactured by Kaneko Chemical Co., Ltd.) and applying ultrasonic waves, and then the toner particles [2Ye] and fluorine are separated by a centrifuge. The toner particles [2Ye] were recovered by separating into a separation treatment solution in which the modified silicone gel was dissolved. Similarly, toner particles [2Mg] and [2Cy] were collected from the monochrome image layer bodies [2Mg] and [2Cy], respectively. The toner particle recovery rate from the multicolor print [2] was 90% in terms of mass.
The amount of the external additive in the toner by the collected toner particles [2Cy], [2Mg], and [2Ye] is measured by quantifying silica fine particles and titanium dioxide fine particles with a fluorescent X-ray analyzer. Toner for reuse [2Cy-2], [2Mg] by adding a short amount of external additive from the initial toner (respective toners [2Cy], [2Mg], [2Ye]) and mixing with a Henschel mixer -2], [2Ye-2], and further mixed with a carrier to obtain reusable developers [2Cy-2], [2Mg-2], [2Ye-2].
Further, the reusable paper [2-2] is obtained by ironing the paper [2] after the monochromatic image layer [2Ye], [2Mg], [2Cy] is peeled from the multicolor print [2]. Got.

(Reproduced multicolor prints)
Using this reusable paper [2-2] and reusable developer [2Cy-2], [2Mg-2], [2Ye-2], the multicolor printed material according to Example 2 [2] In the same manner as above, a multicolor print [2-2] was obtained. This multicolor printed product [2-2] had no visual difference in image quality as compared with the initial multicolor printed product [2].

Example 3
(Initial multicolor print)
By stirring a carrageenan 10% by weight aqueous solution (toner holding material) with a three-one motor to lower the viscosity, applying the solution onto a white PET sheet as the image support substrate [3], and then drying until a soft gel is formed. An image support [3] having a flexible toner holding material layer [3Bk] having a thickness of 20 μm and a penetration of 40 was produced.
A toner image [3Bk] is produced by “bizhub C 253” (manufactured by Konica Minolta Business Technologies) with a fixing device removed from the toner holding material layer [3Bk] of the image support [3] using a developer [1Bk]. And the first fixing body [3Bk] was obtained by allowing the removed fixing device to pass through without being heated.
A toner holding material layer [3Mg] is formed on the toner holding material layer [3Bk] of the first laminate [3Bk] by applying and drying a carrageenan 10 mass% solution in the same manner as described above. A toner image [3Mg] is formed on the toner holding material layer [3Mg] in the same manner as described above using the developer [2Mg] and held on the toner holding material layer [3Mg]. A multi-color print [3] was obtained by coating a transparent PET film having a thickness of 5 μm on the layer [3Mg].
This multi-color print [3] is comparable to the multi-color print obtained by heating and fixing the toner images [3Bk] and [3Mg] in a normal electrophotographic method. It was.

(Separation process)
After the uppermost transparent PET film of the multicolor print [3] was peeled off, an adhesive tape was adhered to the toner holding material layer [3Mg], and the toner holding material layer [3Mg] holding the toner image [3Mg]. The adhesive tape is separated and recovered by immersing it in 100 ° C. ion-exchanged water and applying ultrasonic waves, and then separating it into toner particles [2Mg] and a carrageenan aqueous solution by a centrifuge. Toner particles [2Mg] were recovered. Similarly, toner particles [1Bk] were recovered from the toner holding material layer [3Bk] on which the toner image [3Bk] was held. The toner particle recovery rate from the multicolor print [3] was 95% in terms of mass.
The amount of the external additive in the toner by the collected toner particles [1Bk] and [2Mg] of each color was measured by quantifying the silica fine particles and the titanium dioxide fine particles with a fluorescent X-ray analyzer, and the initial toner ( Toners [1Bk-3] and [2Mg-3] for reuse are obtained by adding a short amount of external additive from toner [1Bk] and [2Mg], respectively, and mixing with a Henschel mixer. Were used to obtain reusable developers [1Bk-3] and [2Mg-3].
Further, the separated carrageenan aqueous solution was evaporated to obtain a 10% by weight carrageenan aqueous solution by evaporating water, and this was used as a reusable toner holding material.
Further, the white color after the toner holding material layer [3Mg] holding the toner image [3Mg] and the toner holding material layer [3Bk] holding the toner image [3Bk] are peeled from the multicolor print [3]. The PET sheet was used as a reusable image supporting substrate [3-2].

(Reproduced multicolor prints)
Using this reusable image supporting substrate [3-2], reusable developers [1Bk-3], [2Mg-3], and a reusable toner holding material, the multicolor according to Example 3 is used. In the same manner as the printed product [3], a multicolor printed product [3-2] was obtained. The multicolor printed product [3-2] had no visual difference in image quality as compared with the initial multicolor printed product [3].

Example 4
(Initial multicolor print)
A silicone gel “SE1891H” (manufactured by Dow Corning Toray) (toner holding material) (toner holding material) is coated on a transparent PET film [4Bk] (interlayer separator) having a thickness of 5 μm with a bar coater, and then left in a sunny place. By curing with sunlight, a toner holding material layer sheet [4Bk] having a flexible toner holding material layer [4Bk] having a thickness of 50 μm and a penetration of 45 was produced.
On the other hand, a toner image formed by “bizhub C 253” (manufactured by Konica Minolta Business Technologies) on which a fixing device is removed using a developer [1Bk] on a white PET sheet [4] (image supporting substrate) [ 4Bk] is transferred, and in the state where the toner holding material layer sheet [4Bk] is superimposed so that the toner holding material layer [4Bk] contacts the toner image [4Bk], the removed fixing device is not heated. The toner image [4Bk] is held on the toner holding material layer [4Bk] of the toner holding material layer sheet [4Bk] to produce a monochromatic image layer [4Bk]. The body [4Bk] was obtained.

Next, by producing monochromatic image layers [4Cy], [4Mg] and [4Ye] in this order on the laminate [4Bk] in the same manner as described above, from the lower layer,
White PET sheet [4] (image supporting substrate),
Monochromatic image layer [4Bk], transparent PET film [4Bk] (interlayer separator),
Monochromatic image layer [4Cy], transparent PET film [4Cy] (interlayer separator),
Monochromatic image layer [4Mg], transparent PET film [4Mg] (interlayer separator),
Monochromatic image layer [4Ye], transparent PET film [4Ye] (surface protective material)
A multicolor print [4] obtained by laminating in this order was obtained.
This multi-color print [4] is comparable to the multi-color print obtained by heating and fixing the toner images [4Bk] to [4Ye] by superposition in the usual electrophotographic method. It was.

(Separation process)
From this multicolored printed material [4], the transparent PET film [4Mg] is pulled in the peeling direction to peel the monochromatic image layer body [4Ye] holding the toner image related to the developer [1Ye], thereby separating it. Transparent PET films [4Mg] and [4Ye] are separated and recovered by immersion in the liquid “esolv 21RS” (manufactured by Kaneko Chemical Co., Ltd.) and ultrasonication, and then the toner particles [ 1Ye] and the separation treatment liquid in which the silicone gel was dissolved, and the toner particles [1Ye] were recovered. Similarly, from the monochrome image layer bodies [4Mg], [4Cy], [4Bk], transparent PET films [4Cy], [4Bk] and toner particles [1Mg], [1Cy], [1Bk], and white PET, respectively. Sheet [4] was collected. The toner particle recovery rate from the multicolor print [4] was 90% in terms of mass.
The amount of the external additive in the toner by the collected toner particles [1Bk], [1Cy], [1Mg], and [1Ye] is determined by quantifying silica fine particles and titanium dioxide fine particles with a fluorescent X-ray analyzer. Reuse toner by measuring, adding insufficient external additives from the initial toner of each color (respective toners [1Bk], [1Cy], [1Mg], [1Ye]) and mixing with a Henschel mixer [1Bk-4], [1Cy-4], [1Mg-4], [1Ye-4] are obtained and further mixed with a carrier to thereby reuse a developer [1Bk-4], [1Cy-4], [1Mg-4] and [1Ye-4] were obtained.
Further, the recovered transparent PET film [4Bk], [4Cy], [4Mg], [4Ye] is used as a reused transparent PET film [4Bk-2], [4Cy-2], [4Mg-2], [4Ye]. -2].
The recovered white PET sheet [4] was washed and dried to obtain a reusable white PET sheet [4-2].

(Reproduced multicolor prints)
This reusable white PET sheet [4-2], a reusable transparent PET film [4Bk-2], [4Cy-2], [4Mg-2], [4Ye-2], and a reusable developer Using [1Bk-4], [1Cy-4], [1Mg-4], and [1Ye-4], in the same manner as the multicolor print [4] according to Example 4, the multicolor print [ 4-2] was obtained. This multicolor printed product [4-2] had no visual difference in image quality as compared with the initial multicolor printed product [4].

11 Image supporting base material 15a, 15b, 15c, 15d Toner holding material layer 16a, 16b, 16c Interlayer separating material 16d Surface protective material 17a, 17b, 17c, 17d Single layer image layer C Intermediate transfer body K Photoconductor P Multicolor printing Product Ta, Tb, Tc, Td Toner image

Claims (12)

A first monochromatic image layer and a second monochromatic image in which a toner image formed by toner particles containing at least a colorant is held in a translucent toner holding material layer on an image supporting substrate. Layers are stacked,
The first single-color image layer and the second single-color image layer are formed from a multicolor print product in which toner images formed by toner particles containing colorants of different colors are held .
An image forming method for obtaining a multicolor print using toner particles separated by a separation process,
The separation process separates the multicolor printed material into an image supporting base material and each single color image layer, and the single color image layer is dissolved into a solution for dissolving the toner holding material layer and not dissolving the toner particles. An image forming method, wherein the method is carried out by immersing the toner holding material layer to dissolve the toner holding material layer and collecting the toner particles. A first monochromatic image layer and a second monochromatic image in which a toner image formed of toner particles containing at least a colorant is held in a translucent toner holding material layer on an image supporting substrate. A layer, a third monochrome image layer, and a fourth monochrome image layer,
The first monochrome image layer, the second monochrome image layer, the third monochrome image layer, and the fourth monochrome image layer hold toner images formed by toner particles containing colorants of different colors. From a multicolored print
An image forming method for obtaining a multicolor print using toner particles separated by a separation process,
The separation process separates the multicolor printed material into an image supporting base material and each single color image layer, and the single color image layer is dissolved into a solution for dissolving the toner holding material layer and not dissolving the toner particles. An image forming method, wherein the method is carried out by immersing the toner holding material layer to dissolve the toner holding material layer and collecting the toner particles. The image forming method according to claim 1, wherein the multicolor printed material has a surface coated with a surface protective material. Laminated on the images supporting substrate on, on the first single-color image layer with the toner image formed by toner particles becomes held in the toner holding layer of translucent containing at least a colorant, the 2. A monochromatic image layer laminating step of laminating a similar second monochromatic image layer with toner particles containing a colorant having a different color from the toner particles forming the first monochromatic image layer . The image forming method according to claim 3 . The image forming method according to claim 4, wherein the monochromatic image layer laminating step is performed by any one of the following means (1) to (3).
(1) Means for obtaining a second monochrome image layer in which a toner image is held in a toner holding material layer, and laminating the second monochrome image layer on the first monochrome image layer.
(2) Means for forming a toner holding material layer on the first monochrome image layer and holding the toner image in the toner holding material layer.
(3) Means for forming a toner image with toner particles on the first monochromatic image layer and superimposing the toner holding material layer on the toner image to hold the toner image in the toner holding material layer.   6. The image forming method according to claim 4, wherein a second monochrome image layer is formed on the first monochrome image layer via an interlayer separator. A first monochromatic image layer and a second monochromatic image in which a toner image formed by toner particles containing at least a colorant is held in a translucent toner holding material layer on an image supporting substrate. The first monochromatic image layer and the second monochromatic image layer are separated from a multicolor print product in which toner images formed by toner particles containing colorants of different colors are held. The image forming method according to any one of claims 1 to 6, wherein a multicolor printed matter is obtained using the image-supporting substrate . On the first monochromatic image layer formed on the image supporting substrate, the toner image formed of toner particles containing at least a colorant is held by a translucent toner holding material layer. A single-color image layer laminating step for forming a similar second single-color image layer with toner particles containing a colorant having a different color from the toner particles forming the single-color image layer of
The image forming method according to claim 7, wherein the monochromatic image layer laminating step is performed by any one of the following means (1) to (3).
(1) Means for obtaining a second monochrome image layer in which a toner image is held in a toner holding material layer , and laminating the second monochrome image layer on the first monochrome image layer.
(2) the toner holding layer formed on the first single-color image layer, means for holding the toner image to the toner holding layer.
(3) to the first single-color image layer, a toner image formed by toner particles, means for holding the toner image to the toner holding layer by superimposing the toner holding layer on the toner image.   A first monochromatic image layer and a second monochromatic image in which a toner image formed by toner particles containing at least a colorant is held in a translucent toner holding material layer on an image supporting substrate. Layers are stacked,
  The first single-color image layer and the second single-color image layer are formed from a multicolor print product in which toner images formed by toner particles containing colorants of different colors are held.
  An image forming method for obtaining a multicolor print using a toner holding material layer obtained by a toner holding material that forms a toner holding material layer separated by undergoing a separation process,
  The separation process separates the multicolor print into an image supporting substrate and each single color image layer, and converts any single color image layer into a dissolution processing solution in which the toner holding material layer is dissolved and the toner particles are not dissolved. An image forming method characterized by being carried out by immersing to dissolve the toner holding material layer and removing the toner particles.   A first monochromatic image layer and a second monochromatic image in which a toner image formed of toner particles containing at least a colorant is held in a translucent toner holding material layer on an image supporting substrate. A layer, a third monochrome image layer, and a fourth monochrome image layer,
  The first monochrome image layer, the second monochrome image layer, the third monochrome image layer, and the fourth monochrome image layer hold toner images formed by toner particles containing colorants of different colors. From a multicolored print
  An image forming method for obtaining a multicolor print using a toner holding material layer obtained by a toner holding material that forms a toner holding material layer separated by undergoing a separation process,
  The separation process separates the multicolor print into an image supporting substrate and each single color image layer, and converts any single color image layer into a dissolution processing solution in which the toner holding material layer is dissolved and the toner particles are not dissolved. An image forming method characterized by being carried out by immersing to dissolve the toner holding material layer and removing the toner particles. On the first monochromatic image layer formed on the image supporting substrate, the toner image formed of toner particles containing at least a colorant is held by a translucent toner holding material layer. A single-color image layer laminating step for forming a similar second single-color image layer with toner particles containing a colorant having a different color from the toner particles forming the single-color image layer of
The image forming method according to claim 9 or 10, wherein the monochromatic image layer laminating step is performed by any of the following means (1) to (3).
(1) Means for obtaining a second monochrome image layer in which a toner image is held in a toner holding material layer , and laminating the second monochrome image layer on the first monochrome image layer.
(2) the toner holding layer formed on the first single-color image layer, means for holding the toner image to the toner holding layer.
(3) to the first single-color image layer, a toner image formed by toner particles, means for holding the toner image to the toner holding layer by superimposing the toner holding layer on the toner image. 12. The image forming method according to claim 11 , wherein the toner particles constituting any one of the monochrome image layers are toner particles separated by the separation process.

Images