JP2006082489A - Method for forming intermediate transfer layer, dimming intermediate transfer recording medium, and transferred article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for forming an intermediate transfer layer for observing a clear printed image by appropriately scattering a light of a light source of a back face and illuminating a uniformed light, a dimming intermediate transfer recording medium, and a transferred article. <P>SOLUTION: The dimming intermediate transfer recording medium is provided with a dimming intermediate transfer layer comprising a binder and a particle whose refractive index difference from that of the binder is 0.08-1.00 on a first substrate. The method is characterized by (a) a process for preparing the dimming intermediate transfer recording medium, (b) a process for preparing a transparent intermediate transfer recording medium, (c) a process for transferring the dimming intermediate transfer layer on a body to be transferred, (d) a process for printing an arbitrary image on a transparent intermediate transfer layer of the transparent intermediate transfer recording medium, and (e) a process for transferring the transparent intermediate transfer layer on which the arbitrary image is printed onto the dimming intermediate transfer layer transferred on the body to be transferred by using the printed transparent intermediate transfer recording medium. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light-controllable intermediate transfer recording medium, and more particularly, to a method for forming an intermediate transfer layer for imparting light scattering by transferring and transferring an intermediate transfer layer onto a transfer medium. The present invention relates to a recording medium and a transfer product.

In the present specification, “ratio”, “part”, “%” and the like indicating the composition are based on mass unless otherwise specified, and the “/” mark indicates that they are integrally laminated.
“LCD” is an abbreviation, functional expression, common name, or industry term for “liquid crystal display”, “PDP” for “plasma display panel”, and “EL” for “electroluminescence”. “(Meth) acrylate” represents “acrylate and methacrylate”.

(Background Art) In recent years, display devices such as CRTs, LCDs, PDPs, and ELs are used for TVs, instrument meter panels, electrical display panels, electrical advertisement boards, and the like. Although the description and contents are printed on the periphery and part of the display device, direct printing may cause an abnormality in the display device which is a precision instrument. The printed matter such as explanatory texts and contents are small lots because the printed contents differ depending on individual products, and the normal printing technology prints each one individually, so there is a problem that the cost is high and the delivery time is long. .
In addition, since the display device as described above receives light from behind, it is difficult to read a printed description or content if the light is uneven.
As such a printed matter, the light from the back is appropriately scattered to make the surface light as uniform as possible, gentle to the eyes, easy to read, low cost printing, and easy to print different contents individually. It has been demanded.

(Prior art) Conventionally, as printed matter having different contents, an intermediate transfer recording medium having an intermediate transfer layer provided on a substrate is used, and the dye of the sublimation transfer ink ribbon is temporarily transferred (printed) to the intermediate transfer layer. In addition, there is known a method in which the intermediate transfer layer on which the mark image is formed is retransferred and transferred to a transfer target such as a display device (for example, see Patent Document 1). However, at a low cost, it is possible to print different contents individually, but when receiving light from behind the intermediate transfer layer transferred and transferred to the transfer target, unevenness such as brightness and brightness of the light is directly observed. There is a drawback that it is difficult to read.
In addition, an intermediate transfer layer made of an ultraviolet curable resin to which inorganic fine particles have been added is known to be UV-cured after being retransferred to a transfer target (see, for example, Patent Document 2). However, the purpose is to prevent blocking by improving heat resistance, and to protect the image by improving scratch resistance and chemical resistance. There is no description or suggestion regarding easy readability, low cost printing, and ease of printing different contents. In other words, even if you make an arbitrary print on this intermediate transfer layer and then re-transfer it to the transfer object, there is a layer containing inorganic fine particles on the print (observation side), so the sharpness of the print decreases. There are drawbacks.
Further, as a light diffusion plate for a backlight of a liquid crystal display device, a substrate in which a layer in which a light diffusing agent such as calcium carbonate, a pearl pigment, silicone resin particles, or silica particles is dispersed in a binder is formed is known. (For example, refer to Patent Documents 3 to 6.) However, since it cannot be transferred, it cannot be transferred and transferred arbitrarily to the transfer object, and even if it is forced to divert these light diffusion plates and superimpose them on the printed matter of the image, it does not adhere. As a result, Newton's rings are generated, resulting in uneven brightness.

JP-A-62-238791 JP 2003-191653 A Japanese Unexamined Patent Publication No. 3-78701 JP 55-84975 A Japanese Patent Laid-Open No. 1-172801 JP-A-2-173701

  Accordingly, the present invention has been made to solve such problems. The purpose is to provide a dimming intermediate transfer layer comprising particles having a refractive index difference between the binder and the binder of 0.08 to 1.00 on the transfer medium, and observing from the dimming intermediate transfer layer. On the side, the transparent intermediate transfer layer on which an arbitrary image is printed is transferred and transferred, and the light source light from the back surface is appropriately scattered and illuminated with uniform light, so that the light source shape is difficult to see, and To provide a method for forming an intermediate transfer layer, a dimmable intermediate transfer recording medium, and a transfer product for balancing light transmission and light diffusivity at a high level so that a clear printed image can be observed. It is.

In order to solve the above-mentioned problem, a light-controllable intermediate transfer recording medium according to the invention of claim 1 is provided with a light-controllable intermediate medium capable of being peeled at least on the first base and one surface of the first base. In the light-controllable intermediate transfer recording medium provided with the transfer layer, the light-controllable intermediate transfer layer of the light-controllable intermediate transfer recording medium contains a binder and particles, and the refractive index difference between the binder and the particles is 0. It is what was carried out so that it might be 08-1.00.
The light controllable intermediate transfer recording medium according to the invention of claim 2 is such that the average particle diameter of the particles of the light controllable intermediate transfer layer is larger than 0 and not larger than 10 μm.
The light controllable intermediate transfer recording medium according to the invention of claim 3 is such that the binder of the light controllable intermediate transfer layer is an acrylic resin and the particles are a styrene resin or a melamine-formaldehyde resin. It is.
The light controllable intermediate transfer recording medium according to the invention of claim 4 has a haze of 80% or more measured according to JIS-K7105 of the light controllable intermediate transfer layer, and the total light measured according to JIS-K7105. The transmittance is 80% or more.
The transfer product according to the invention of claim 5 includes: (a) a dimmable intermediate transfer comprising a first substrate and a dimmable intermediate transfer layer provided on at least one surface of the first substrate so as to be removable. A step of preparing a recording medium; and (b) a second intermediate substrate, and a transparent intermediate transfer recording medium in which a transparent intermediate transfer layer is provided on one surface of the second substrate so as to be at least peelable. And (c) a step of transferring a light-modulating intermediate transfer layer to a transfer medium using the light-modulating intermediate transfer recording medium, and (d) a transparent intermediate transfer layer of the transparent intermediate transfer recording medium. And (e) using the printed transparent intermediate transfer recording medium, the arbitrary image is printed on the light-controllable intermediate transfer layer transferred to the transfer medium as described above. A step of transferring the transparent intermediate transfer layer formed thereon, and a method for forming the intermediate transfer layer on the transfer material comprising: As transparent intermediate transfer layer optical intermediate transfer layer and the arbitrary image tone is printed is formed, it is obtained by.
The transfer product according to the invention of claim 6 comprises: (a) a dimmable intermediate transfer comprising a first substrate and a dimmable intermediate transfer layer provided on at least one of the first substrate so as to be removable. A step of preparing a recording medium, (b) a step of printing an arbitrary image on the light-controllable intermediate transfer layer of the light-controllable intermediate transfer recording medium, and (c) the light-controllable intermediate-transfer recording having been printed. A step of transferring a light-controllable intermediate transfer layer on which an arbitrary image is printed onto a transfer medium using a medium, and a method for forming an intermediate transfer layer on the transfer medium comprising: A dimming intermediate transfer layer on which the above image is printed is formed.
According to a seventh aspect of the present invention, there is provided a method for forming an intermediate transfer layer comprising: (a) a first base material, and a dimmable intermediate transfer layer provided on at least one surface of the first base material so as to be removable. A step of preparing an optical intermediate transfer recording medium; and (b) a transparent intermediate transfer recording in which a second intermediate substrate and a transparent intermediate transfer layer are provided on one surface of the second substrate so as to be at least peelable. A step of preparing a medium, (c) a step of transferring a light-modulating intermediate transfer layer to a transfer medium using the light-modulating intermediate transfer recording medium, and (d) a transparency of the transparent intermediate transfer recording medium. A step of printing an arbitrary image on the photosensitive intermediate transfer layer, and (e) using the printed transparent intermediate transfer recording medium, the optional transfer to the dimming intermediate transfer layer transferred to the transfer medium as described above And a step of transferring the transparent intermediate transfer layer on which the above image is printed.
The method for forming an intermediate transfer layer according to the invention of claim 8 comprises: (a) a first base material, and a light controllable intermediate transfer layer provided on one surface of the first base material so as to be at least peelable. A step of preparing a light-sensitive intermediate transfer recording medium; (b) a step of printing an arbitrary image on the light-controllable intermediate transfer layer of the light-controllable intermediate transfer recording medium; And a step of transferring a light controllable intermediate transfer layer on which an arbitrary image has been printed onto a transfer medium using a photosensitive intermediate transfer recording medium.

The inventors of the present invention have made extensive studies and basically, a light-controllable intermediate transfer layer that balances light transmission and light diffusibility at a high level appropriately scatters light from the back surface, Focusing on the fact that illumination with uniform light makes it possible to observe a printed image in which the shape of the light source is difficult to see, and in order to solve these problems, the problem is solved by transferring the light-controllable intermediate transfer layer onto the transfer target We were able to.
According to the first to third aspects of the present invention, the dimmable intermediate transfer layer on which an arbitrary image is printed on the transfer target, or the dimming intermediate transfer layer on the transfer target is further transferred. Can transfer the transparent intermediate transfer layer on which the image is printed, can transfer the dimming intermediate transfer layer or the transparent intermediate transfer layer on which any image is printed, and appropriately scatters the light source from the back And a light-controllable intermediate transfer recording medium that can observe a printed image in which the shape of the light source is difficult to see by illuminating with uniformed light.
According to the fourth aspect of the present invention, there is provided a light-controllable intermediate transfer recording medium capable of balancing light transmission and light diffusibility at a high level.
According to the fifth aspect of the present invention, there is provided a transfer material in which the light source shape from the back surface is appropriately scattered and illuminated with uniform light, whereby the shape of the light source is difficult to see and a clearer print image can be observed. Provided.
According to the sixth aspect of the present invention, there is provided a transfer product capable of observing a printed image in which the shape of the light source is difficult to be seen by appropriately scattering the light source light from the back surface and illuminating with the uniformed light.
According to the seventh aspect of the present invention, an intermediate transfer layer that makes it difficult to see the shape of the light source and allows a clearer printed image to be observed by appropriately scattering the light source light from the back surface and illuminating with uniform light. A forming method is provided.
According to the eighth aspect of the present invention, there is provided an intermediate transfer layer forming method capable of observing a printed image in which the shape of the light source is difficult to see by appropriately scattering the light source light from the back surface and illuminating with the uniformed light. The

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view illustrating a method for forming an intermediate transfer layer according to the present invention.
FIG. 2 is a cross-sectional view of a dimmable intermediate transfer recording medium showing one embodiment of the present invention.
FIG. 3 is a cross-sectional view of the transparent intermediate transfer recording medium used in the present invention.

(Invention of Intermediate Transfer Recording Medium) In the light controllable intermediate transfer recording medium 1A of the present invention, the light controllable intermediate transfer layer 15A contains a binder and particles, and the refractive index difference between the binder and the particles is 0.08 to 1.00, preferably the binder is an acrylic resin, the particles are a styrene resin or a melamine-formaldehyde resin, and the average particle diameter of the particles is 10 μm or less. Moreover, it is preferable that the haze measured based on JIS-K7105 of the said light control intermediate transfer layer is 80% or more, and the total light transmittance measured based on JIS-K7105 is 80% or more.
FIG. 2A shows a dimmable intermediate transfer recording medium 1A of the present invention, which includes a first base material 11A and a peelable dimmable intermediate transfer layer 15A on one surface of the first base material.
FIG. 2 (B) is a dimmable intermediate transfer recording medium 1A showing another embodiment of the present invention, and a release layer 13A may be provided between the first substrate 11 and the dimmable intermediate transfer layer 15A. When the release layer 13A is provided, the release during transfer is more stable.
In addition, the receiving layer 21 may be provided on the surface of the light control intermediate transfer layer 15A. When printing is performed on the light control intermediate transfer layer 15A by a sublimation transfer method or the like, if the image is not printed well, the receiving layer 21 is provided. Can be printed on the intermediate transfer recording medium. Furthermore, if the receiving layer 21 is made of an adhesive resin, it can also serve as an adhesive layer.
Furthermore, an adhesive layer may be provided on the surface of the light controllable intermediate transfer layer 15A or the receiving layer 21, and when the printing screen area on the light controllable intermediate transfer layer 15A is large, the light transfer intermediate transfer layer 15A to be transferred Although the adhesion to the body 101 is hindered, if the adhesive layer 19 is provided, it can be more closely adhered to the transfer body and firmly adhered.
Further, a heat resistant back layer 9A may be provided on the surface opposite to the light control intermediate transfer layer 15A of the first base material 11A, and adhesion to the first base material 11A due to heat during transfer can be prevented. There is no breakage or jamming of the intermediate transfer recording medium 1A, and transfer efficiency can be improved.
As shown in FIG. 2, the transparent intermediate transfer recording medium 1B includes a second base material 11B and a peelable transparent intermediate transfer layer 15B on one surface of the first base material. Similar to the intermediate transfer recording medium 1A, a release layer 13B, an adhesive layer 19B, and a heat resistant back layer 9B may be provided.

  (Invention of Transferred Material) A dimmable intermediate transfer layer 15A and a transparent intermediate transfer layer 15B on which an arbitrary image is printed or a dimmable intermediate transfer layer 15A on which an arbitrary image is printed on a transfer medium. The transferred material is a TV with a display device such as a CRT, LCD, PDP, EL, etc., a meter panel for machinery, an electric display panel, an electric advertising board, etc., and a back surface such as a light diffusion plate for backlight. It can be used for objects that receive light from Moreover, it can be easily transferred to a molded product or a three-dimensional object as well as a film or board-shaped transfer object.

(Invention of Method 1) (a) A light-controllable intermediate transfer recording medium comprising a first base material and a light-controllable intermediate transfer layer that is at least peelable on one surface of the first base material is prepared. (B) preparing a transparent intermediate transfer recording medium having (b) a second base material, and a transparent intermediate transfer layer provided on at least one surface of the second base material so as to be peelable; ) A step of transferring the light controllable intermediate transfer layer to the transfer medium using the light controllable intermediate transfer recording medium; and (d) any image on the transparent intermediate transfer layer of the transparent intermediate transfer recording medium. And (e) a transparent intermediate in which an arbitrary image is printed on the light-controllable intermediate transfer layer transferred to the transfer medium using the printed transparent intermediate transfer recording medium. And a step of transferring the transfer layer.
By doing so, a transparent intermediate transfer layer on which an arbitrary image is printed is formed on the observation side from the dimming intermediate transfer layer. It is scattered moderately, the brightness unevenness between the light sources is reduced and the shape of the light source is difficult to see, and as a result, more uniform surface light can be obtained, so the printed image can be observed clearly, so it is easy on the eyes, The contents are easy to read.

(Invention of Method 2) (a) A light-controllable intermediate transfer recording medium comprising a first base material and a light-controllable intermediate transfer layer at least peelable on one surface of the first base material is prepared. A step, (b) a step of printing an arbitrary image on the dimming intermediate transfer layer of the dimming intermediate transfer recording medium, and (c) using the printed dimming intermediate transfer recording medium. And a step of transferring a light-modulating intermediate transfer layer on which an arbitrary image is printed onto a transfer target.
In this way, a dimmable intermediate transfer layer on which an arbitrary image is printed is formed, so that even when observed with a light source from the back side, the light source light is appropriately scattered, and the brightness between the light sources. The unevenness is reduced and the shape of the light source is difficult to see. As a result, uniform surface light can be obtained, so that a printed image can be observed although it is slightly inferior to the invention of claim 7.
In the method for forming an intermediate transfer layer according to any one of claims 7 to 8, the dimmable intermediate transfer recording medium according to any one of claims 1 to 4 can be preferably used.

(Materials) First, materials used for the intermediate transfer recording medium will be described in detail.
The light control intermediate transfer recording medium 1A and the transparent intermediate transfer recording medium 1B are the same except that the intermediate transfer layer is a light control intermediate transfer layer 15A and a transparent intermediate transfer layer 15B. The peeling layer, the heat resistant back layer, and the adhesive layer are common.
(First base material, second base material) The first base material 11A and the first base material 11B (hereinafter collectively referred to as the base material 11, hereinafter the same), the heat resistance and the machine that can withstand the heat of the thermal head Various materials can be applied depending on the use as long as they have a mechanical strength, mechanical strength that can withstand manufacturing, and solvent resistance. For example, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer, nylon 6 Polyamide resins such as nylon 66 and nylon 610, polyolefin resins such as polyethylene, polypropylene, polymethylpentene and cyclic polyolefin, vinyl resins such as polyvinyl chloride, poly (meth) acrylate, polymethyl (meth) acrylate, etc. Acrylic resins, polyimides, polyamideimides, imide resins such as polyetherimide, polyarylate, polysulfone, polyethersulfone, polyphenylene ether, polyphenylene Engineering resins such as rufide (PPS), polyaramid, polyetherketone, polyethernitrile, polyetheretherketone, polyethersulfite, styrenes such as polycarbonate, polystyrene, high impact polystyrene, AS resin, ABS resin Examples thereof include resins, cellophane, cellulose triacetate, cellulose diacetate, and cellulose-based films such as nitrocellulose.

The substrate may be a copolymer resin containing these resins as a main component, a mixture (including an alloy), or a laminate composed of a plurality of layers. The substrate may be a stretched film or an unstretched film, but a film stretched in a uniaxial direction or a biaxial direction is preferable for the purpose of improving the strength. The substrate is used as a film, sheet or board formed of at least one layer of these resins. Usually, polyester films such as polyethylene terephthalate and polyethylene naphthalate are preferably used because of their good heat resistance and mechanical strength, and polyethylene terephthalate is most suitable.
The thickness of the base material differs depending on the base material of the medium to be transferred with a heat roll and the base material of the medium to be transferred with a thermal head. That is, in claim 7, the second substrate 11B of the transparent intermediate transfer recording medium 1B to be printed is a heat roll and the first substrate 11A of the light-controllable intermediate transfer recording medium 1A to be printed is a heat roll. This corresponds to the base material of the medium to be transferred. In this case, the thickness of the substrate is usually about 2.5 to 50 μm, preferably 2.5 to 38 μm, and most preferably 12 to 38 μm. If the thickness exceeds this, the heat transfer of the heat roll is poor and heating is insufficient, resulting in poor printing or poor adhesion during thermal transfer. Below this, mechanical strength is insufficient and wrinkles are likely to occur, especially in multicolor or color printing. It is remarkable in the case of.
In the case of the substrate of the medium to be transferred by the thermal head, the thickness of the substrate is usually about 2.5 to 50 μm, preferably 2.5 to 12 μm, and most preferably 4 to 6 μm. If the thickness is greater than this, the heat transfer of the thermal head is poor, and if it is less than this, the mechanical strength is insufficient.

  Prior to application, the substrate is subjected to corona discharge treatment, plasma treatment, ozone treatment, flame treatment, primer (also called an anchor coat, adhesion promoter, or easy adhesive) application treatment, pre-heat treatment, dust removal treatment. Alternatively, easy adhesion treatment such as vapor deposition treatment or alkali treatment may be performed. Moreover, you may add additives, such as a filler, a plasticizer, a coloring agent, and an antistatic agent, as needed.

(First Release Layer, Second Release Layer) The release layer 13 may be omitted, but may be provided between the substrate 11 and the intermediate transfer layer 15 in order to stabilize the release strength and release during transfer. Although a part of the release layer 13 may move to the transfer target, it does not substantially affect the function and is within the scope of the present invention.
As a material for the release layer 13, a release resin, a resin containing a release agent, a curable resin that is cross-linked by ionizing radiation, and the like can be used. Examples thereof include acrylic resins, vinyl acetate resins, melamine resins, polyester resins, urethane resins, fluorine resins, silicones, epoxy resins, and fiber resins. The resin containing the release agent is, for example, an acrylic resin, a vinyl resin, a polyester resin, a fiber resin, or the like obtained by adding or copolymerizing a release agent such as fluorine resin, silicone, or various waxes. It is. The curable resin that is cross-linked by ionizing radiation is, for example, a resin containing a monomer / oligomer having a functional group that is polymerized (cured) by ionizing radiation such as ultraviolet (UV) or electron beam (EB).

(Formation of release layer) The release layer 13 is formed by dispersing or dissolving the resin in a solvent to obtain a low route, reverse roll coat, gravure coat, reverse gravure coat, bar coat, rod coat, kiss coat, knife coat, die coat. It is formed by applying and drying by a known coating method such as comma coating, flow coating, spray coating, etc., and removing the solvent. If necessary, it is crosslinked by heat drying at a temperature of 30 ° C. to 120 ° C., aging, or irradiation with ionizing radiation.
The thickness of the release layer 13 is usually about 0.01 μm to 5.0 μm, preferably about 0.5 μm to 3.0 μm. The thinner the thickness is, the better. However, when the thickness is 0.1 μm or more, better film formation is obtained and the peeling force is stabilized.

(Light control intermediate transfer layer) The light control intermediate transfer layer 15A is composed of a binder and particles.
Examples of the binder include acrylic resins, polyester resins, polystyrene resins, polyvinyl chloride resins, polyvinylidene chloride resins, polyethylene resins, polypropylene resins, polyurethane resins, polyamide resins, and polyvinyl acetate resins. Polyvinyl alcohol resin, epoxy resin, cellulose resin, diene resin, organosiloxane resin, polyimide resin, polysulfone resin, polyarylate resin and the like can be used.
Among these, in terms of transfer suitability, controllability of the difference in refractive index with the particles, wettability, adhesion to the substrate 11, or scratch resistance of the resin itself, light resistance, transparency, poly (meth) acrylate, Acrylic resins such as polymethyl (meth) acrylate, polyethyla (meth) acrylate, polybutyl (meth) acrylate, poly-2-ethylhexyl (meth) acrylate, and poly t-butyl (meth) acrylate are particularly preferred.

  (Particles) As inorganic fine particles, for example, calcium carbonate, calcium silicate, clay, kaolin, talc, silica, glass, diatomaceous earth, mica powder, alumina, magnesium oxide, zinc oxide, barium sulfate, aluminum sulfate, calcium sulfate, basic Magnesium carbonate, molybdenum disulfide, hollow silica particles, porous silica particles, colloidal silica, and the like can be applied.

As the organic fine particles, a thermoplastic resin having a glass transition temperature of 120 ° C. or higher is preferable. For example, WAX, polyethylene, fluorine-based resin, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (Mata ) Acrylic resins such as acrylate or butyl (meth) acrylate, thermosetting resins such as phenolic resin, urea resin, melamine resin, epoxy resin, unsaturated polyester resin, polystyrene, styrene and / or α-methylstyrene and others Fine particles such as copolymers with monomers (eg, maleic anhydride, phenylmaleimide, methyl methacrylate, butadiene, acrylonitrile, etc.) (eg, AS resin, ABS resin, MBS resin, heat-resistant ABS resin, etc.) it can.
Preferred particles include transparency, ease of adjusting the refractive index, styrene resins such as crosslinked polystyrene obtained by crosslinking styrene, vinyl toluene, α-methyl styrene, halogenated styrene, or melamine such as melamine-formaldehyde resin. Resin. You may use particle | grains individually or in combination of 2 or more types.
In order to increase the commercial value within the scope of achieving the object of the present invention, a filler, a plasticizer, a colorant, an antistatic agent, a light stabilizer, a heat stabilizer, and other additives are added as necessary. It may be added and blended separately.

  The particle diameter of the particles is an average particle diameter of more than 0 and about 30 μm or less, preferably more than 0 and about 10 μm or less, more preferably 0.2 to 5.0 μm. If it is less than this range, the foil cutting property is poor, and if it exceeds this, dispersibility is bad, and smoothness is impaired. In a more preferable range of 0.2 to 5.0 μm, the total light transmittance can be increased even though the haze is high.

  By setting the refractive index difference between the binder and the particles to 0.08 to 1.00, an appropriate light scattering property can be obtained. Further, the content of the particles is 10 to 100 parts by mass of the binder resin. About 500 parts by mass, preferably in the range of 20 to 200 parts by mass. If it is less than this range, the foil breakability at the time of transfer is poor, and if it exceeds this range, the dispersibility is poor, the brittleness becomes uneven and the foil breakability becomes unstable. The shape of the particles is not particularly limited, and may be spherical, rectangular, plate-like, flake-like, needle-like, or hollow.

(Optical characteristics) Optical characteristics such as haze measured according to JIS-K7105, total light transmittance measured according to JIS-K7105 of the dimmable intermediate transfer layer by adjusting the above materials. Can be balanced at a high level.
When the haze measured according to JIS-K7105 of the light controllable intermediate transfer layer is 80% or more, preferably 90% or more, if the haze is less than this range, the light diffusibility is insufficient, and the haze exceeds this range. Light transmittance deteriorates.
The total light transmittance measured in accordance with JIS-K7105 is 80% or more, preferably 90% or more. If the total light transmittance is less than this range, the brightness is insufficient.
As a result, the optical characteristics of the dimmable intermediate transfer layer in the above range are such that any printed image scatters the light source light from the back appropriately and illuminates with the uniformed light, so that the light source shape is It becomes difficult to see and a clear print image can be observed.

  (Transparent Intermediate Transfer Layer) The transparent intermediate transfer layer 15B can use the same binder as the dimming intermediate transfer layer 15A, and does not contain particles. However, an additive such as a filler, a plasticizer, a colorant, and an antistatic agent may be added as necessary as long as it does not affect the printed image.

(Receiving layer) Further, a receiving layer 21 may be provided on the surface of the light controllable intermediate transfer layer 15A. When printing is performed on the light controllable intermediate transfer layer 15A by a sublimation transfer method or the like, If the layer 21 is provided, a clear image can be easily printed on the intermediate transfer recording medium at a higher printing speed or lower printing energy.
The receiving layer 21 is a thermoplastic resin, such as a vinyl chloride-vinyl acetate copolymer, an ionomer resin, which is bonded to the light controllable intermediate transfer layer 15A by being melted or softened by heat in order to increase the ink receiving property. Acid-modified polyolefin resin, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) acrylic acid ester copolymer, polyester resin, polyamide resin, vinyl resin, acrylic / methacrylic ) Acrylic resins, acrylic ester resins, maleic resins, butyral resins, alkyd resins, polyethylene oxide resins, polyurethane resins, polyvinyl ether resins, silicone resins, rubber resins, etc. are applicable. Use alone or in combination.

  The resin of the receiving layer 21 is preferably a vinyl chloride-vinyl acetate copolymer resin from the viewpoint of dye dyeability. The thickness of the receiving layer 21 is usually about 0.05 to 10 μm, preferably 0.1 to 5 μm. If the thickness of the receiving layer 21 is less than this range, the adhesive strength with the transfer medium is insufficient and drops off, and if the thickness is higher than that, the adhesive effect is sufficient and the effect remains unchanged, which is wasteful in cost. Furthermore, the heat of the thermal head is wasted. Furthermore, additives such as a filler, a plasticizer, a colorant, and an antistatic agent may be appropriately added to the receiving layer 21 as necessary.

  (Formation of receiving layer) When the receiving layer 21 is provided on the surface of the light controllable intermediate transfer layer 15A, the receiving layer 21 is formed by applying the above-described composition (ink) by a known coating method or printing method and drying. To do. As a coating method or a printing method, a method similar to the formation of the release layer 13 can be applied. Drying may be brushed as necessary to improve transferability.

  (First Adhesive Layer, Second Adhesive Layer) The adhesive layer 19 can be applied with a heat-adhesive adhesive that is melted or softened by heat to bond, for example, ionomer resin, acid-modified polyolefin resin, ethylene- (meta) Acrylic acid copolymer, ethylene- (meth) acrylic ester copolymer, polyester resin, polyamide resin, vinyl resin, acrylic / methacrylic (meth) acrylic resin, acrylic ester resin, A maleic acid resin, a butyral resin, an alkyd resin, a polyethylene oxide resin, a polyurethane resin, a polyvinyl ether resin, a silicone resin, a rubber resin, or the like can be used, and these resins are used alone or in combination.

  The resin of the adhesive layer 19 is preferably an acrylic resin, a butyral resin, or a polyester resin in terms of adhesive strength. The thickness of the adhesive layer 19 is usually about 0.05 to 10 μm, preferably 0.1 to 5 μm. If the thickness of the adhesive layer 19 is less than this range, the adhesive strength with the transfer medium is insufficient and drops off, and if the thickness is higher than this range, the adhesive effect is sufficient and the effect does not change, which is wasteful in cost. Furthermore, the heat of the thermal head is wasted. Furthermore, additives such as a filler, a plasticizer, a colorant, and an antistatic agent may be appropriately added to the adhesive layer 19 as necessary.

  (Formation of Adhesive Layer) An adhesive layer 19 is provided on the surface of the intermediate transfer layer 15. The adhesive layer 19 is formed by applying and drying a composition (ink) obtained by dispersing or dissolving the above-mentioned heat-adhesive resin in a solvent by a known coating method or printing method. As a coating method or a printing method, a method similar to the formation of the release layer 13 can be applied. Drying may be brushed as necessary to improve transferability.

(First heat resistant back layer, second heat resistant back layer)
The heat-resistant back layer 9 includes a silicon-modified resin or a heat-resistant thermoplastic resin binder and a substance that functions as a heat release agent or a lubricant as basic constituent components. As the silicone-modified resin, a silicone-modified acrylic resin, a silicone-modified urethane resin, or the like, a heat-resistant thermoplastic resin binder can be selected from a wide range, but suitable examples include acrylic resins, polyester resins, There are styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, polyimide resin, polyamide resin, cellulose acetate propionate, cyclized rubber and polyvinyl alcohol. The composition for forming the heat-resistant back layer 9 is formed by blending 10 to 100 parts by mass of the above-described lubricant or thermal release agent with respect to 100 parts by mass of the thermoplastic resin binder. For application to the substrate, the ink is kneaded with an appropriate solvent, and the release layer 13 of the substrate 11 is not formed by a coating method such as a roll coating method or a gravure coating method, as in a general coating agent application method. What is necessary is just to apply | coat to a surface by about 0.1-4 g / m < ² > of solid content, and to dry. In order to ensure adhesion between the base material 11 and the heat resistant back layer 9, a primer layer may be provided on the base material 11 in advance, or may be cross-linked with a curing agent in order to increase heat resistance.

(Intermediate Transfer Layer Forming Method 1) Next, the intermediate transfer layer forming method of the present invention of claim 7 will be described.
As shown in FIG. 1, the method for forming an intermediate transfer layer of the present invention is as shown in FIG. 1A. (A) The first base material and one surface of the first base material are at least peelable. The step of preparing a light-controllable intermediate transfer recording medium provided with a light-controllable intermediate transfer layer, FIG. 1B, includes (b) a second substrate and at least one surface of the second substrate. The process of preparing a transparent intermediate transfer recording medium provided with a transparent intermediate transfer layer so as to be peeled, FIG. 1 (C) is prepared by (c) using the light controllable intermediate transfer recording medium to prepare a transfer medium. The step of transferring the optical intermediate transfer layer, FIG. 1D is (d) the step of printing an arbitrary image on the transparent intermediate transfer layer of the transparent intermediate transfer recording medium, and FIG. (E) Transparency in which an arbitrary image is printed on the light-controllable intermediate transfer layer that has been transferred to the transfer medium using the printed transparent intermediate transfer recording medium. Step of transferring between the transfer layer, a city.

  (Preparation process of light control intermediate transfer recording medium and transparent intermediate transfer recording medium) First, as shown in FIG. 1A, (a) a light control intermediate transfer recording medium 1A and FIG. As shown, (b) a transparent intermediate transfer recording medium 1B is prepared, but it is omitted because it includes the manufacturing method in the description of the material.

(Image printing step) As shown in FIG. 1C, (c) a step of printing an arbitrary image on the transparent intermediate transfer layer of the transparent intermediate transfer recording medium,
An arbitrary image is printed on the transparent intermediate transfer layer 15B of the transparent intermediate transfer recording medium 1B composed of the second substrate 11B / transparent intermediate transfer layer 15B.
The printing method is not particularly limited. For example, a known inkjet method (IJ), a thermal transfer method (TR) using a thermal melting ink ribbon by a thermal printer, or a sublimation ink ribbon is used. A heat sublimation transfer method (ST) or the like is preferable.

The image by the printing may be formed in the layer of the transparent intermediate transfer layer 15B and / or the layer surface, or a part thereof. FIG. 1C illustrates an example in which one part is in a layer.
If the area of the image is large, the adhesion to the transfer medium may be adversely affected. Therefore, it is preferable to provide the adhesive layer 19B on the surface of the transparent intermediate transfer layer 15B. In the case of the thermal sublimation transfer method (ST), printing can be performed even if the adhesive layer 19B is provided in advance.

(Step of Dimming Intermediate Transfer Layer on Transferred Member) As shown in FIG. 1D, (d) using the dimmable intermediate transfer recording medium, the dimming intermediate transfer layer is applied to the transferred member. The transfer process
Using the light-controllable intermediate transfer recording medium 1A composed of the intermediate transfer layer 15A, it is transferred to the transfer target 101 by heating and pressing with a known hot stamp, thermal printer, heat roller or the like. Then, by removing and removing the first base material 11 </ b> A, the dimmable intermediate transfer layer 15 </ b> A moves to the transfer target 101. When the adhesive layer 19A is provided, the transfer can be performed more firmly and at a lower temperature. Further, it is more preferable that an easy adhesion treatment such as a primer is performed in advance on the transfer portion of the transfer object.

(Transfer to be Transferred) The transfer target 101 is not particularly limited as long as it is a transparent body, and the shape of the transfer target is not particularly limited, such as a film, a sheet, a board, and a molded product. At least a part of the medium 101 may be colored, printed, or otherwise decorated.
For example, any plastic film or glass that does not deform due to heat during transfer may be used. In terms of applications, it is used for front plates of display devices such as CRT, LCD, PDP, EL, TVs, instrument meter panels, electric display boards, electric advertising boards, and the like.
Although the description and contents are printed on the periphery and part of the display device, direct printing may cause an abnormality in the display device which is a precision instrument. Conventionally, printed materials such as explanatory texts and contents are printed in small lots because the printed contents differ depending on the individual products, and the usual printing technology prints each one individually, so the difficulty of high cost and long delivery time There is. According to the present invention, these difficulties are solved, and printing is performed on an intermediate transfer medium, so that even different contents can be printed at low cost.

(Transfer process of transparent intermediate transfer layer) As shown in FIG. 1 (E), (e) using the transparent intermediate transfer recording medium already printed by the process of FIG. In this step, the transparent intermediate transfer layer on which an arbitrary image is printed is transferred to the surface of the light controllable intermediate transfer layer 15A.
Using the transparent intermediate transfer recording medium 1B composed of the transparent intermediate transfer layer 15B on which an arbitrary image has been printed, by applying heat and pressure with a known hot stamp, thermal printer, heat roller, etc., the transfer target 101 Transfer again to the surface of the upper dimming intermediate transfer layer 15A. Then, by peeling off and removing the second base material 11B, the transparent intermediate transfer layer 15B on which an arbitrary image is printed moves to the transfer target 101. When the adhesive layer 19A is provided, the image can be transferred more firmly and at a lower temperature. From the observation side, the transparent intermediate transfer layer 15B (with an arbitrary image) / dimming intermediate transfer layer 15A / covered The transfer body 101 is configured.

  By adopting such an intermediate transfer layer formation method, even if light is received from the back with light and darkness or unevenness of brightness by a plurality of light sources, the light from the back is appropriately scattered and the surface light is as uniform as possible. In addition, the transmission sharpness is high, and it is easy for the eyes and easy to read.

  (Intermediate Transfer Layer Forming Method 2) Next, an intermediate transfer layer forming method according to an eighth aspect of the present invention will be described. The method for forming an intermediate transfer layer according to claim 8 includes: (a) a first base material, and a dimmable intermediate layer comprising a dimmable intermediate transfer layer at least peelable on one surface of the first base material. A step of preparing a transfer recording medium, (b) a step of printing an arbitrary image on the light-controllable intermediate transfer layer of the light-controllable intermediate transfer recording medium, and (c) the light-controllable intermediate transfer having been printed And a step of transferring a light-controllable intermediate transfer layer on which an arbitrary image is printed onto a transfer medium using a recording medium.

Compared with the method for forming an intermediate transfer layer according to claim 7, an arbitrary image is directly printed on the light control intermediate transfer layer without using the transparent intermediate transfer layer, and the light control intermediate transfer layer including the printed image Is transferred and transferred to a transfer medium.
In this way, the invention of claim 7 is slightly inferior to that of the invention of claim 7, but even when observed with a light source from the back, the light source light is appropriately scattered, the luminance unevenness between the light sources is reduced, and the light source shape is reduced. It is difficult to see, and as a result, more uniform surface light is obtained, so that a printed image can be observed.

(Modification) The present invention includes the following modifications.
(Modification 1) In the invention of claim 7, the steps (c) and (d) may be performed in reverse order or at the same time, and may be appropriately selected depending on the machine to be transferred.
(Modification 2) (a) An arbitrary image is printed on the transparent intermediate transfer layer of the transparent intermediate transfer medium, and (b) the dimmable intermediate transfer medium is printed on the printed screen of the printed transparent intermediate transfer layer. The light-controllable intermediate transfer layer may be primarily transferred, and (c) two layers of the printed transparent intermediate transfer layer / light-controllable intermediate transfer layer may be secondarily transferred to the transfer target.
(Deformation mode 3) (a) A layer having a refractive index difference between the binder and the particles corresponding to the dimming intermediate transfer layer of 0.08 to 1.00 or a dimming intermediate transfer layer in advance to the transfer target A light control layer having a haze and a total light transmittance corresponding to (b), (b) printing an arbitrary image on the transparent intermediate transfer layer of the transparent intermediate transfer medium, and (c) printed transparency. The intermediate transfer layer may be configured to be transferred to the light control layer surface on the transfer target.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this.

(Preparation of transparent intermediate transfer recording medium)
As the second substrate of the transparent intermediate transfer recording medium, a polyethylene terephthalate film (trade name: Lumirror S10, manufactured by Toray Industries, Inc.) having a thickness of 38 μm was used, and a heat resistant slipping layer having the following composition was applied to the back surface of the substrate. The liquid is applied and dried by gravure coating so that the dry coating amount is 0.10 to 0.20 g / m ² to form a heat resistant back layer.
・ <Heat-resistant protective layer coating solution>
Silicone-modified acrylic resin (solid content 26%) 10.0 parts (trade name: Polyalloy NSA-X55, manufactured by NATCO)
Toluene / methyl ethyl ketone (mass ratio 1/1) 40.0 parts On the surface of the base material provided with the heat resistant back layer provided with no heat resistant back layer, a release layer coating solution having the following composition was dried. It was coated with a coater so as to have a thickness of 0.5 g / m ² and dried at 80 ° C. to form a release layer.
・ <Peeling layer coating solution>
Acrylic resin (solid content 30%) 10.0 parts (trade name LP-45M, manufactured by Soken Chemical Co., Ltd.)
Toluene / methyl ethyl ketone (mass ratio 1/1) 10.0 parts On the formed release layer, a transparent intermediate transfer layer coating liquid having the following composition has a thickness after drying of 5.0 g / m ² . As described above, the coating was applied with a gravure reverse coater and dried at 100 ° C. to form a transparent intermediate transfer layer to obtain a transparent intermediate transfer recording medium.
・ <Transparent intermediate transfer layer coating solution>
Acrylic resin (trade name BR-87, manufactured by Mitsubishi Rayon Co., Ltd.) 50 parts Methyl ethyl ketone 100 parts Toluene 100 parts

(Preparation of dimmable intermediate transfer recording medium)
As the first substrate of the light-controllable intermediate transfer recording medium, a 38 μm thick polyethylene terephthalate film (trade name Lumirror S10 manufactured by Toray Industries, Inc.) is used. The heat-resistant slip layer coating liquid used was applied and dried by gravure coating so that the dry coating amount was 0.10 to 0.20 g / m ² , thereby forming a heat-resistant back layer.
The release layer coating liquid used for the transparent intermediate transfer recording medium is dried to a thickness of 0.5 g / m ² on the surface of the base material provided with the heat resistant back layer provided with no heat resistant back layer. Then, it was coated with a coater and dried at 80 ° C. to form a release layer.
On the release layer formed above, a dimmable intermediate transfer layer coating solution having the following composition was coated with a gravure reverse coater so that the thickness after drying was 5.0 g / m ^2, and the coating layer was 100 ° C. It was dried to form a light control intermediate transfer layer, and the light control intermediate transfer recording medium of Example 1 was obtained.
・ <Light control intermediate transfer layer coating solution>
Acrylic resin (trade name BR-87, manufactured by Mitsubishi Rayon Co., Ltd.) 50 parts Cross-linked styrene resin particles (trade name SX-130H, manufactured by Soken Chemical Co., Ltd.) 50 parts Methyl ethyl ketone 100 parts Toluene 100 parts The particle diameter is 3 μm, the refractive index is 1.59, the refractive index of the binder is 1.49, and the refractive index difference is 0.10.

  A dimmable intermediate transfer recording medium was obtained in the same manner as in Example 1 except that the heat-resistant back layer was not provided.

  A dimmable intermediate transfer recording medium was obtained in the same manner as in Example 1 except that the release layer was not provided.

  A dimmable intermediate transfer recording medium was obtained in the same manner as in Example 1 except that melamine-formaldehyde resin particles having a particle diameter of 0.25 to 0.55 μm and a refractive index of 1.66 were used as particles.

  A dimmable intermediate transfer recording medium was obtained in the same manner as in Example 1 except that melamine-formaldehyde resin particles having a particle diameter of 1 to 2 μm and a refractive index of 1.66 were used as particles.

The dimmable intermediate transfer layer of the dimmable intermediate transfer recording medium of Example 1 was transferred to the A3 size acrylic plate having a thickness of 3 mm as a transfer target using a heat roll type thermal transfer printer, and transferred to the first substrate. The material was peeled off and slowly removed.
Next, an image is printed on the transparent intermediate transfer layer of the transparent intermediate transfer recording medium. For printing, a face photograph and characters were printed by a 600 dpi thermal transfer printer using a heat melting type thermal transfer sheet (manufactured by Dai Nippon Printing Co., Ltd., three color standard ribbons of yellow, magenta, and cyan).
Next, the transparent intermediate transfer layer on which the face photograph and characters of the transparent intermediate transfer recording medium are printed is transferred to the light controllable intermediate transfer layer surface of the acrylic plate / light control intermediate transfer layer obtained above. The entire surface was transferred with a mold thermal transfer printer, and the second substrate was peeled off and gradually removed to obtain a transfer product of Example 6.

  A transfer product was obtained in the same manner as in Example 6 except that the dimmable intermediate transfer recording medium of Example 2 was used.

  A transfer product was obtained in the same manner as in Example 6 except that the dimming intermediate transfer recording medium of Example 3 was used.

  A transfer product was obtained in the same manner as in Example 6 except that the dimmable intermediate transfer recording medium of Example 4 was used.

  A transfer product was obtained in the same manner as in Example 6 except that the dimmable intermediate transfer recording medium of Example 5 was used.

(Comparative Example 1)
A dimmable intermediate transfer recording medium of Comparative Example 1 was obtained in the same manner as in Example 1 except that the following dimmable intermediate transfer layer coating solution was used.
・ <Light control intermediate transfer layer coating solution>
Acrylic resin (trade name BR-87, manufactured by Mitsubishi Rayon Co., Ltd.) 50 parts Titanium oxide particles 100 parts Methyl ethyl ketone 100 parts Toluene 100 parts The particle diameter of the titanium oxide particles is 0.02 μm and the refractive index is 2.71. The refractive index of the binder is 1.49 and the refractive index difference is 1.22.

(Comparative Example 2)
A dimmable intermediate transfer recording medium of Comparative Example 2 was obtained in the same manner as in Example 1 except that the following dimmable intermediate transfer layer coating solution was used.
・ <Light control intermediate transfer layer coating solution>
Acrylic resin (trade name BR-87, manufactured by Mitsubishi Rayon Co., Ltd.) 50 parts Cross-linked acrylic 50 parts Methyl ethyl ketone 75 parts Toluene 75 parts The particle diameter of the crosslinked acrylic particles is 1.5 μm, and the refractive index is 1.49. The binder has a refractive index of 1.49 and a refractive index difference of 0.00.

(Comparative Example 3)
A transfer product was obtained in the same manner as in Example 6 except that the light-modulating intermediate transfer recording medium of Comparative Example 1 was used.

(Comparative Example 4)
A transfer product was obtained in the same manner as in Example 6 except that the dimmable intermediate transfer recording medium of Comparative Example 2 was used.

(Evaluation methods)
The haze (passed 80% or more), total light transmittance (passed 80% or more), and visibility of the dimmable intermediate transfer recording media of Example 1 and Comparative Example 2 were visually observed and evaluated.
Both haze and total light transmittance (hereinafter also referred to as Tt) were measured using a turbidimeter NDH-1001DP (manufactured by Nippon Denshoku Industries Co., Ltd., trade name) in accordance with JIS-K7105. The haze was measured before printing, but after printing, it may be measured at a portion where there is no image, may be measured including the base material, and may be a transferred material if the material to be transferred is transparent. There is no significant effect.

(Evaluation results)
As shown in “Table 1”, the haze and total light transmittance of the light-modulating intermediate transfer recording media of Examples 1 to 5 and Comparative Examples 1 and 2 are all within the acceptable range in Examples 1 to 5. The light transmission and light diffusivity were balanced at a high level. In Comparative Example 1, the total light transmittance was low, and in Comparative Example 2, the haze was low.
Moreover, the transcription | transfer thing of Examples 6-10 and Comparative Examples 3-4 is illuminated with the light source which put in order five commercially available fluorescent lamps in parallel from the to-be-transferred object side (back side of an image), and from the image side. It was observed visually.
In the transferred materials of Examples 6 to 10, the light source light from the back surface was appropriately scattered and illuminated with uniform light, and it was difficult to see the shape of the light source, and a clear print image could be observed.
Moreover, in the transfer material of Comparative Examples 3-4, there was no scattering of the light source light from the back, the illumination light was uneven, the light source shape was visible, and the printed image was poor in visibility.

It is sectional drawing explaining the formation method of the intermediate transfer layer of this invention. 1 is a cross-sectional view of a dimmable intermediate transfer recording medium showing one embodiment of the present invention. It is sectional drawing of the transparent intermediate transfer recording medium used for this invention.

Explanation of symbols

1A: Dimmable intermediate transfer medium 1B: Transparent intermediate transfer medium 9: Heat resistant back layer 11A: First base material 11B: Second base material 13: Release layer 15A: Dimmable intermediate transfer layer 15B: Transparent intermediate transfer medium Layer 19: Adhesive layer 31: Printed portion 101: Transfer target

Claims (8)

In a light-controllable intermediate transfer recording medium comprising a first base material and a light-controllable intermediate transfer layer provided on at least one surface of the first base material so as to be peelable, the control of the light-controllable intermediate transfer recording medium is provided. A light-controllable intermediate transfer recording medium, wherein the light-sensitive intermediate transfer layer contains a binder and particles, and the refractive index difference between the binder and the particles is 0.08 to 1.00. The light controllable intermediate transfer recording medium according to claim 1, wherein the average particle diameter of the particles of the light controllable intermediate transfer layer is greater than 0 and 10 μm or less. The light-controllable intermediate transfer according to claim 1, wherein the binder of the light-controllable intermediate transfer layer is an acrylic resin, and the particles are a styrene-based resin or a melamine-formaldehyde-based resin. recoding media. The haze measured according to JIS-K7105 of the light controllable intermediate transfer layer is 80% or more, and the total light transmittance measured according to JIS-K7105 is 80% or more. The dimmable intermediate transfer recording medium according to any one of 1 to 3. (A) a step of preparing a first base material and a light-controllable intermediate transfer recording medium in which a light-controllable intermediate transfer layer is provided on at least one surface of the first base material so as to be peelable; (b) A step of preparing a second base material, and a transparent intermediate transfer recording medium in which a transparent intermediate transfer layer is provided at least on one surface of the second base material so as to be peelable; and (c) the dimming intermediate A step of transferring a light-modulating intermediate transfer layer to a transfer medium using a transfer recording medium, and a step (d) of printing an arbitrary image on the transparent intermediate transfer layer of the transparent intermediate transfer recording medium, (E) a step of transferring the transparent intermediate transfer layer on which an arbitrary image has been printed, to the light-controllable intermediate transfer layer transferred to the transfer medium using the printed transparent intermediate transfer recording medium. A method for forming an intermediate transfer layer on a transfer medium comprising: a dimmable intermediate transfer layer and an optional image on the transfer target; There transcript characterized by comprising formed transparent intermediate transfer layer which is printed. (A) a step of preparing a first base material and a light-controllable intermediate transfer recording medium in which a light-controllable intermediate transfer layer is provided on at least one surface of the first base material so as to be peelable; (b) A step of printing an arbitrary image on the light-controllable intermediate transfer layer of the light-controllable intermediate transfer recording medium, and (c) using the printed light-controllable intermediate transfer recording medium, A process for transferring a dimmable intermediate transfer layer on which an image has been printed, and a method for forming an intermediate transfer layer on a transfer medium comprising the steps, and a dimming intermediate transfer on which an arbitrary image has been printed on the transfer target A transfer product comprising a layer. (A) a step of preparing a first base material and a light-controllable intermediate transfer recording medium in which a light-controllable intermediate transfer layer is provided on at least one surface of the first base material so as to be peelable; (b) A step of preparing a second base material, and a transparent intermediate transfer recording medium in which a transparent intermediate transfer layer is provided at least on one surface of the second base material so as to be peelable; and (c) the dimming intermediate A step of transferring a light-modulating intermediate transfer layer to a transfer medium using a transfer recording medium, and a step (d) of printing an arbitrary image on the transparent intermediate transfer layer of the transparent intermediate transfer recording medium, (E) a step of transferring the transparent intermediate transfer layer on which an arbitrary image has been printed, to the light-controllable intermediate transfer layer transferred to the transfer medium using the printed transparent intermediate transfer recording medium. And a method for forming an intermediate transfer layer on a transfer medium. (A) a step of preparing a first base material and a light-controllable intermediate transfer recording medium in which a light-controllable intermediate transfer layer is provided on at least one surface of the first base material so as to be peelable; (b) A step of printing an arbitrary image on the light-controllable intermediate transfer layer of the light-controllable intermediate transfer recording medium, and (c) using the printed light-controllable intermediate transfer recording medium, And a step of transferring the light-controllable intermediate transfer layer on which the image is printed, and a method of forming the intermediate transfer layer on the transfer target.

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