JPH02257138A - Generation of copy - Google Patents

Abstract

PURPOSE: To obtain a glossy or semi-glossy copy while making an image clear by mixing non-resin developer powder and thermoplastic resin powder capable of obtaining transparency. CONSTITUTION: A developer component is constituted of a finely divided non- resin developer and finely divided thermoplastic resin, and when a color coupler is brought into contact with the surface of the component layer, the developer reacts with the coupler to form a visible image, the thermoplastic resin is fused to a film by heating and a copy forming the image in the film can be obtained. When the non-resin developer is used together with the finely divided thermoplastic resin, a glossy developer component can be prepared, so that glossy finishing can be attained. The developer component can be provided with suitable density, and when the thermoplastic component is fused, a transparent positive image can be obtained. Consequently a glossy or semi-glossy copy having a clear image or a transparent positive image can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a glossy or semi-gloss finish copy (
The present invention relates to a copy making method using a developer sheet for obtaining a transparent positive (transparency) copy.

Developer sheets are utilized in conventional pressure sensitive copy papers or in photosensitive imaging systems using microcapsules. In the latter system, a developer sheet forms a visible image by contacting it with a color precursor released from the microcapsules in an image-forming manner. Pressure sensitive copy paper is well known in the art and is described in U.S. Pat. No. 2,712,507, 3,0
16.308, 3,170,809, 3,455.
No. 721, No. 3,466.184, No. 3,672.935
No. 3,955,025, No. 3,981.523.

Photosensitive imaging systems using microencapsulated photosensitive compositions are described in U.S. Pat. No. 4,399.209;
No. 4,440,846. A feature of these imaging systems is that an imaging sheet having a layer of microcapsules made of a dispersed phase of a photosensitive composition is irradiated with light to form an image. In most typical embodiments, the photosensitive composition is a photopolymerizable composition that includes an unsaturated polyethylene compound and a photoinitiator that is encapsulated with a color former.

The imagewise exposure hardens the dispersed phase of the microcapsules. Following exposure, the imaging sheet is passed through a nip between a set of pressure rollers and subjected to a uniform bursting force.

U.S. Pat. No. 4,399,209 discloses a transfer system in which an imaging sheet is combined with a developer sheet before being subjected to burst forces. Upon contact with the developer and passed through a pressure roller, the microcapsules rupture, releasing the dispersed phase to form an image, where the color formers are transferred to the developer sheet and transferred to the dry developer. reacts with and forms a color image.

The imaging system is capable of reproducing full-color images, either monochromatic or multicolored. Also, U.S. Patent No. 4,440
, 846 discloses a self-contained system in which the color former is released into a developer layer on the same surface of the imaging sheet.

When the pressure-sensitive or photosensitive imaging systems described above are used to reproduce graphic images, it is sometimes required that the reproduced image have a high degree of gloss. In addition, if a transparent positive is required, it must be able to effectively transmit light. Conventional developer compositions have difficulty achieving these objectives. Since the reaction between the developer and the color former occurs primarily at the surface of the developer, finely divided developer powders that provide a large reactive surface area are preferred. Further, the interparticle spaces of the developer powder form a network structure that attracts the color forming agent to the developer layer and increases the density of the image. However, the main drawback of these compositions is that they scatter light and the images are less sharp.

One technique that has been used for some time to create highly glossy images is U.S. Pat. No. 4.554,2
There is one disclosed in No. 35. In this technique, a developer layer is formed over a discontinuous layer of thermoplastic polymeric pigment. After exposure, the imaging sheet is combined with a developer sheet and pressure is applied. The color former is released from the microcapsules, passes through the layer of polymeric pigment, and reacts with the developer. The thermoplastic pigment is then subjected to heat and/or pressure to fuse the pigment into a transparent continuous film, thereby producing a glossy finish on the image.

Applicants have also developed several developer sheets having layers containing thermoplastic developer resins. These developer resins react with color formers and reproduce glossy images when heated, without the thermoplastic pigment supplementary layer of the above patents. 198
U.S. Patent Application No. 073,036, filed July 14, 2007
In the issue, a development sheet made from glossy thermoplastic phenol resin is disclosed. No. 086,059, filed August 14, 1987, discloses glossy thermoplastic acrylic developer resins made from emulsion or suspension polymerization. And February 5, 1988
U.S. Patent Application No. 152,685, filed in Japan, discloses a low viscosity developer composition that is a mixture of the aforementioned phenolic and acrylic developer resins. U.S. Patent Application No. 027.390 discloses that in order to reduce viscosity,
A developer sheet is disclosed in which a reactive thermoplastic developer is used in conjunction with a pigment; in one example, the pigment may be a thermoplastic latex.

(Problems to be Solved by the Invention) However, it is not always necessary to make the developer itself a thermoplastic resin in order to create a developer layer that provides gloss. The fact that the developer itself provides glossiness means that it dissolves, and since it does not provide glossiness, it may be rather difficult to obtain high resolution at the same time.

That is, an object of the present invention is to provide a method for making copies that can make the image clear and at the same time provide gloss or semi-gloss, give a glossy finish, and form a transparent positive. There is a particular thing.

(Means for Solving the Problems) Therefore, the present invention provides that the non-resinous developer compound that does not dissolve during polishing is finely divided in the same manner as the non-resinous developer compound that dissolves during polishing. Based on the knowledge that a glossy developer composition can be created by combining a non-resin developer powder with a transparent thermoplastic resin powder, There are some methods that address the above-mentioned problems by configuring a developer composition.

In other words, the specific means for this purpose is a copy making method for obtaining a copy with a gloss finish or a semi-gloss finish or a copy for transparent positive, which uses non-resin developer powder and this developer powder. a color former so that the image is formed in a layer of a developer composition containing a mixture with a thermoplastic resin powder that is substantially inert to the surface and fuses with heat to form a transparent or translucent film; This method is characterized by comprising a step of bringing the thermoplastic resin powder into contact with each other, and a step of heating and fusing the thermoplastic resin powder (first means).

The non-resin developer powder can be formed from a salicylic acid derivative (second means).

The above salicylic acid derivative can be zinc salicylate or a zinc salicylate substitute (third means).

In the third means, the developer composition may additionally contain a binder (fourth means).

In the fourth means, the minimum film forming temperature (minimum film forming temperature) of the thermoplastic resin powder is 50 to 9
It can be kept within the range of 0°C (fifth means).

In the fifth means, the thermoplastic resin powder can be selected from the group consisting of acrylic resin, vinyl resin, and phenolic resin (sixth means).

In the sixth means, the thermoplastic resin powder may be formed of phenol formaldehyde resin (
7th means).

In the sixth means, the thermoplastic resin powder can be formed from a resin obtained by oxidative coupling polymerization of phenol (eighth means).

In the sixth means, the thermoplastic resin powder can be made of acrylic resin (ninth means).

In the sixth means, the thermoplastic resin powder can be formed from a styrene-acrylic copolymer (the first
0 means).

In the ninth means, the thermoplastic resin powder can be formed from an isobornyl acrylate copolymer (
11th means).

In the third means, the thermoplastic resin powder can be formed of a resin having substantially the same refractive index as the developer powder (twelfth means).

In the first means, the step of bringing a color former into contact with the layer of the developer composition includes rays of light (ultraviolet light, visible light, etc.) so as to form an image on the layer of microcapsules containing the photocurable composition and the color former. and applying a uniform bursting force to the microcapsule layer to rupture the microcapsules so that the color former is released into the developer composition layer to form an image. (13th means).

In the thirteenth means, the developer composition layer and the microcapsule layer can be provided on separate supports (fourteenth means).

In the thirteenth means, the developer composition layer and the microcapsule layer can be provided on the same support (fifteenth means).

In the first means, the non-resin developer powder may contain a proton source (sixteenth means).

The proton source can be a latent proton source (seventeenth means).

The potential proton source can be obtained by acetylsalicylate (18th means).

In the sixteenth means, the proton source is selected from the group consisting of 2,6-dihydroxybenzoic acid, 3-phenoxybenzoic acid, 2-phenoxybenzoic acid, maleic acid, glycolic acid, stearic acid, and P-toluenesulfinic acid. (19th means).

In the first means, the non-resinous developing powder includes salicylic acid, 3-phenylsalicylic acid, 3-cyclohexylsalicylic acid, 3-tert-butyl-5-methylsalicylic acid, 3.5-ditert-butyrusalicylic acid, 3-Methyl-5-benzylsalicylic acid, 3-phenyl-5-(
α, α~dimethylbenzyl) salicylic acid, 3-cyclohexyl-5-(α, α-dimethylbenzyl) salicylic acid, 3-(α, α-dimethylbenzyl)-5-methylsalicylic acid, 3.5-dicyclohexyl salicylic acid, 3.5
-di(α-methylbenzyl)salicylic acid, 3.5-di(α,α-dimethylbenzyl)salicylic acid, 3-(α-
methylbenzyl)5-(α,α-dimethylbenzyl)salicylic acid, 4-methyl-5-cyclohexyl salicylic acid, 2-hydroxy-1-benzyl-3-naphthoic acid,
1-benzoyl-2-hydroxy-3-naphthoic acid, 3
~hydroxy-5-cyclohexyl-2-naphthoic acid,
and polyvalent metal salts (twentieth means).

(Function) In the case of the copy making method described above, a developer composition is formed using developer powder, that is, a finely divided non-resin developer, and thermoplastic resin powder, that is, a finely divided thermoplastic resin. When a color former is brought into image-forming contact with the surface of the layer, the developer reacts with the generally colorless color former, such as an electron donor compound, to form a visible image;
Finely divided thermoplastic resin is heated and fused to form a film.

The developer composition layer has a high permeability to the color former because the voids between the particles of the developer powder and the thermoplastic resin powder exhibit a capillary action, and therefore the resolution is high. Then, the thermoplastic resin powder is fused by heating to form a transparent or translucent film, thereby obtaining a copy in which an image is formed within the transparent or translucent film.

In other words, by using a developing sheet that has a layer of finely divided thermoplastic resin powder that fuses into a thin film after development and a layer of finely divided solid non-resin developing powder, gloss can be achieved. These developer compositions can have a suitable density and can later be made into a glaze or transparent positive by fusing with a thermoplastic component. It is something that can be done.

In this case, the developing powder does not need to be dissolved;
This will be included in the film formed by fusing the resin powder. This film then provides a glossy finish when the image is formed on an opaque background. on the other hand,
If the refractive index of the film made of resin powder and the refractive index of the developed powder after development are almost equal, the developer composition will effectively transmit light and form a transparent positive when an image is formed on a transparent background. will give.

Incidentally, a coating of a developer composition can be applied to commercially available bond paper with little or no curling, and the surface of this coating layer has a texture or texture similar to that of bond paper. have

(Effects of the Invention) Therefore, according to the present invention, since a copy is made using a developer composition layer formed by mixing non-resin development powder and thermoplastic resin powder, transparent Images are formed with high resolution on a semitransparent or semitransparent background, making it possible to obtain glossy or semiglossy copies or transparent positives with clear images.

(Example) The present invention will be explained in detail below.

The thermoplastic resin can be a functional developing material such as a thermoplastic phenolic resin (for example, phenol formaldehyde resin) that has film-forming properties. In another embodiment, the thermoplastic resin is not a reactive developer, but rather a thermoplastic co-4 pigment that fuses upon heating. The latter embodiment is generally preferred because it provides lactude in selecting the developer material.

Thermoplastic resin powder is a finely divided thermoplastic resin material and is provided on a support as finely divided particles, usually about 0.1 to 25 microns. in this case,
The material can be coated onto a support as a resin powder and heated up to 60°C without coalescing;
A material is selected that has the property of being easily fused after transfer when heated to 120°C. The minimum film formation temperature (M
FFT) is preferably in the range of about 50-90°C, and melting temperature (MFT) is preferably in the range of about 110-150°C. The particle size is approximately 01
More preferably, it is within the range of 5 to 25 microns.

Two types of resins can be used in the present invention: one with developability and one without developability. A typical example of a thermoplastic resin having developability is a phenolic resin.

Phenol resins have traditionally been used as developing materials in pressure-sensitive recording materials. These resins may be condensates of phenol (including substituted phenols) and formaldehyde. Examples of phenolic resins used in the present invention include U.S. Pat.
No. 466.184, No. 3,672,935, No. 4,025
, No. 490 and No. 4,225,962.

Phenolic resins used in the present invention further include oxidative polymerization products of substituted or unsubstituted phenols or biphenyls. Although oxidative polymerization is accomplished using a variety of catalysts, a particularly desirable catalyst is the enzyme horseradish peroxidase. Particularly desirable materials are the resins disclosed in US Pat. No. 4,647,952, which is also incorporated herein by reference, and particularly desirable are the oxidative polymerization products of bisphenol A.

The phenol resin used in the present invention may be made into a metal salt (metalate) in order to improve development characteristics. These resins are metallized by reaction with a salt selected from the group consisting of copper, zinc, aluminum, tin, cobalt, and nickel salts in a manner known to those skilled in the art. Ru. Most typically, the resin is zincate to improve development. The metal content of the resin is usually about 1 by weight.
~5% and may be in the range up to 15%.

Preferably, phenolic materials such as phenol formaldehyde condensates are used. In particular, alkylphenolic resins and also metal salts of alkylphenolic resins are used. Preferably, the alkylphenol has one substituent with an alkyl group containing 1 to 12 carbon atoms.

Examples of alkylphenols are ortho- or para-substituted ethylphenol, propylphenol, butylphenol, amylphenol, hexylphenol, heptylphenol, octylphenol, nonylphenol, t-butylphenol, t-butylphenol,
-octylphenol, etc.

Other examples of thermoplastic materials active as developers include:
resinous condensates of zinc salts and polyvalent metal salts such as phenol;
There are phenol formaldehyde condensates and phenol salicylic acid formaldehyde condensates. This material is manufactured by Schenectady Chemical Company under the names HRJ 4250 and HRJ 4252.
It is commercialized by Chemical Co.). These products are known as metal salt condensation acid products of ortho- or para-substituted alkylphenols, substituted salicylic acids, and formaldehyde. Further developer-active resins include pendant salicylic or phenolic moieties as disclosed in U.S. Patent Application No. 086,059, filed August 14, 1987.
ieties).

The finely divided thermoplastic resin powder used in the present invention can be obtained by several methods. That is, resin powder can be made by common crushing methods, it can also be obtained by atomization of a melt of resin material, and it can also be produced as droplets by injecting the melt into rapidly agitated water. It can also be obtained by solidification. It is also possible to obtain it by dissolving the resin material in a solvent/non-solvent system and removing the solvent. Schenectady (Sch
enectady) HI? J4250, IIRJ
Other materials such as 4252 resin are also available in dispersed form.

Non-reactive thermoplastic resins are also used in the present invention as developer compositions. Examples of non-reactive resins include acrylic resins, styrene resins, vinyl resins, and thermoplastic latexes. Many of these materials have been commercialized. One example of a non-reactive material is acryloid.
id) An acrylic copolymer such as isobornyl acrylate sold by Rohm & Haas under the name DM-55. Other commercially available thermoplastic resins include Dow.
) XD 899301 Latex, Dow
722 latex, doe (D.

w) 788 Latex (product of Doe Chemical Company),
UCAR 4630X Latex, UCAR 4510 Latex (Union Carbide's styrene acrylic latex), Polystyrene Latex 561 and 5612 (Union Oil, California)
, Polysar 1], 83, Polysar 9'010-P%, Polysar 11G4 (polystyrene latex from Polysar Latex Co.), Acrylic Latex 200 (product of Union Oil Co., California), Casco・(Casco) Wax (Bourdain<
Borden (wax emulsion manufactured by Borden), and Paraco (Bercury Chemical)
There is a wax emulsion manufactured by Lercules Chemical Co., Ltd. Rohm & Haas
Dialecs from Haas
) Styrene acrylate latex sold under the name -708 is particularly desirable.

The non-resinous developer used in the present invention includes a number of compounds or materials that have been previously used with developers in the carbonless paper industry. Main examples include electron-accepting materials such as acidic clays;
Examples include alkali metal salts of monobasic acids such as formic acid and propionic acid (see US Pat. No. 3,682,680), and salicylic acid derivatives and their salts.

The salicylates used in the present invention are those known in the art. A prime example is salicylic acid and its metal salts. These compounds may be substituted on the phenyl ring with one or more substituents that improve the development properties of the compound. Examples of salicylate developers include U.S. Pat.
No. 46, No. 3.924,027, 3.983. ．． 292
There is something disclosed in the issue. The most suitable developer is
It is a zinc salt. Useful developers include salicylic acid, 3
-Phenylsalicylic acid, 3-cyclohexylsalicylic acid, 3-tert-butyl-5-methylsalicylic acid, 3.
5-ditertiarybutyl salicylic acid, 3-methyl-5
-Benzylsalicylic acid, 3-phenyl-5-(α, α-
dimethylbenzyl)salicylic acid, 3-cyclohexyl-
5-(α,α2]dimethylbenzyl)salicylic acid, 3-(α,α-dimethylbenzyl)-5-methylsalicylic acid, 3.5-dicyclohexylsalicylic acid, 3.5 di(α-methylbenzyl)salicylic acid, 3 .5 Di(α,α-dimethylbenzyl)salicylic acid, 3-(α-methylbenzyl)-5-(α
, α-dimethylbenzyl)salicylic acid, 4-methyl-5
Cyclohexyl salicylic acid, 2-hydroxy-1-benzyl-3-naphthoic acid, 1-benzoyl-2-hydroxy-3-naphthoic acid, 3-hydroxy-5-cyclohexyl-2-naphthoic acid, and these compounds. There are polyvalent metal salts, namely zinc salts, aluminum salts, magnesium salts, calcium salts, and cobalt salts. These compounds can be used alone or in combination.

In some cases, depending on the nature of the color former being developed, salicylates and 2.6 dihydroxybenzoic acid, 3-phenoxybenzoic acid, 2-phenoxybenzoic acid, maleic acid, glycolic acid, stearic acid may be added to increase the concentration. It may be desirable to use a combination of proton sources such as , and p-toluenesulfinic acid. These compounds are normally used in amounts of about 1-5% of the developer composition. Certain compounds disappear when developed with zincate developers, but this is prevented by using protonated developers.

In another embodiment of the invention, a latent proton source may be used. A characteristic of latent proton sources is that they release protons over time. One example is O-acetylsalicylic acid which decomposes over time to acetic acid and salicylic acid which provides a source of protons to the developer composition. The amount used is again about 1-5%.

It may also be appropriate to use salicylates, which have a high melting point so that they do not dissolve on polishing, together with acids such as benzoic acid, which dissolve on polishing. The latter acts as a plasticizer and promotes polishing.

Non-resinous developers may have particle sizes of about 0.1 to 25 microns.

The developer composition can include about 5-50% non-resinous developer powder and about 45-90% thermoplastic resin powder by weight. Desirably, the developer composition includes about 20-40% salicylate development powder and about 55-75% thermoplastic resin powder. The specific melon used will depend on the properties of the non-resinous developer, and especially its reactivity, fade resistance, and resistance to moisture, and the properties of the thermoplastic, especially its film-forming properties, and how it reacts with the color former. It varies depending on whether or not.

In selecting the thermoplastic resin used in the present invention,
The important thing is to choose a resin that has good compatibility with non-resin developers. In particular, developer compositions are typically made by mixing a non-fusible developer powder and a thermoplastic resin powder together in an atLritor or ball mill. salicylate,
In particular, the zinc salt reacts with certain resins, forming complexes and creating non-particulate agglomerates. This is undesirable and needs to be prevented. Additionally, when fusing thermoplastic resins, it is important that the resin wets the surface of the salicylate or other developer.

Dispersion aids or surfactants are commonly used in conventional methods to disperse the developer powder within the thermoplastic resin powder. These examples are explained in later examples.

U for increased resistance to fade and to prevent yellowing
It is desirable that the developer composition contains one or both of a V absorber and an optical pre-toner. Absorbers such as hydroxyphenylbenzotriazole, known optical pre-donors such as stilbene derivatives can be used for this purpose. These materials are typically used in amounts of about 1-5% as needed to enhance image quality.

The support of the developing sheet may be transparent or opaque. In a preferred embodiment of the invention, pepper or
Synthetic films such as polyethylene terephthalate are used.

The developer sheet is obtained by coating a support with a finely divided coating material of the developer composition described above using known coating techniques. The coating material may be a suspension of a developer composition in water as a dispersion medium. The developer composition is typically applied to the surface of the support in an amount of about 8 to]5 g/m2 dry weight. Depending on the nature of the material and its method of production, conventional binders such as polyvinyl alcohol are used to secure the developer composition to the support. The amount of binder is about 1-6%.

The developer sheet is used in a known manner, with the exception that the composition is heated to fuse the resin powder. Generally, the composition is heated after the color former is transferred to the surface of the developer sheet. However, in microcapsule imaging systems, it is also conceivable to heat the composition during transfer using a heated pressure roller to rupture the microcapsules.

The resin powder in the developer composition layer is fused by heating. In the process of the present invention, typing in pressure sensitive recording,
Alternatively, the color former is imagewise transferred to the developer composition layer by passing an imagewise irradiated photosensitive imaging sheet through a nip between a set of pressure rollers. The photosensitive imaging system used in the present invention is described in US Pat. No. 4,399,209;
No. 4,440,846.

The thermoplastic resin powder is then fused, for example, by heating the developer sheet in contact with a heated roller or set of heated rollers, or by passing the developer sheet through a heated platen.

Furthermore, as an alternative, the developer sheet can be placed in a hot oven. Furthermore, as another example, a photosensitive imaging sheet is combined with a developer sheet and passed through a set of heated pressure rollers, thereby transferring the coloring agent and simultaneously transferring the thermoplastic resin of the developer composition. Powders may also be fused. This method, however,
Sometimes it is not appropriate. This is because the thermoplastic resin powder may coalesce before proper reaction of the color former occurs.

The developer composition used in the present invention is particularly suitable for applications such as microfilm or microfiche copying where very good resolution is required. Transfer of the dispersed layer to the surface of the developer sheet can be described using a capillary model (Washburn equation). In this equation, the depth of liquid penetration is the average radius of the hole and
It is proportional to the square root of both the dispersion layer and the contact time with the capillaries (defined by the spacing of the particles on the surface of the developer sheet). It is known that as the amount of space in the developer composition layer increases, the resolution increases. By controlling the particle size of the developer composition, a developer composition with excellent capillary action and a large amount of space can be obtained. These developer compositions have the high resolution required for microfiche and microfilm imaging and copying. 100
A resolution of line pairs/mm is obtained.

The process of the present invention may be utilized in either transfer or self-contained imaging systems. In a transfer imaging system, microcapsules containing a color former and a developer composition are provided on separate supports, and the color former is transferred to the support with the developer composition to form an image. Ru. In self-contained imaging systems, the microcapsules containing the color former and the developer composition are placed in layers on the same surface of a common support. When the microcapsules rupture, the color former moves to the developer composition layer and reacts there.

In a preferred embodiment of the self-contained imaging system, the developer composition is disposed on the surface of a transparent support coated with a layer of microcapsules containing a color former and a photosensitive composition. In this system, the imaging sheet is irradiated from either side of the support, and after development the image is viewed through the transparent support. In other systems, the microcapsules are overcoated with paper or coated with white pigment, resulting in an image with a white background.

Specific example> A detailed description of the invention is provided in the following non-limiting examples.

The following materials were mixed in an attritor operated at 20<0>C and 300 rpm.

Amount of material (g) Addition time (min) Water 89.01 Apex 18-s (35%) (A) 3.
57IGE PAL C0897 (70%) (B)
1.97 Drevplus L-198 (C) 0.6
30 Leucophor L (D) 2
．． 5-zinc salicylate 37.5 5-sulfosalicylic acid 1.25 Acryloid DM-55(E) 67.5
Paralojd KI2ON (P) 6.
25 ■ Tjnovin 32G (G) 2.5
12 Polyvinyl alcohol (H) 7.5
45 The above materials (A) to (II) are as follows.

(A) Alcolac, Inc. (AI) of Baltimore, MD
(B) Nonylphenoxy poly(ethylene epoxy) ethanol surfactant manufactured by GAP Co., Ltd. (C) Dispersion aid (D) Chi'v-Roll NC) manufactured by Linden N, J. Sandoz Chemical (Sa
Diaminostilbene disulfonic acid derivative (E) manufactured by Rohm and Haas, Philadelphia PA.
Isobornyl acrylate copolymer (P) manufactured by Rohm & Haas, Philadelphia PA
Acrylic polymer (G) from Ciba-Geigy (M & Haas) pillar manufacturing UV absorption (
11) Air Products and Chemical in Allentown PA
als) Column production pinol (Vjnol) 205 After 55 minutes, the mixing was then stopped, the composition was removed from the atride, coated on a paper base stock with coating type 11i 10 g/m 2 and dried. . Prepared pursuant to U.S. Pat. No. 4,399,209;
The composition formed a satisfactory image when passed through a nip between a set of pressure rollers with an irradiated imaging sheet.

Although the present invention has been described above in detail with reference to embodiments, the present invention can be modified in various ways without departing from the scope of the appended claims.

that's all

Claims (1)

[Claims] (1) A copy making method for obtaining copies with a glossy or semi-gloss finish or copies for transparent positives, comprising a non-resin developer powder and a material substantially inert to the developer powder. contacting a color former in an image-forming manner with a layer of a developer composition comprising a mixture with a thermoplastic resin powder and a thermoplastic resin powder which is fused by heating to form a transparent or translucent film; A copy making method comprising the step of heating and fusing plastic resin powder.