JPS59177547A - Method and device for thermodevelopment and transfer - Google Patents

Abstract

PURPOSE:To improve efficiency in thermodevelopment and transfer by obtg. a color image by using a thermodeveloping photosensitive material having a photosensitive layer which releases a mobile hydrophilic dye from an exposed or non-exposed part when heated and a conductive exothermic layer and an image receiving material having a dye fixing layer. CONSTITUTION:Light is irradiated to an original O of a transmission type in an exposing stage 19, and the image of the original is formed on the photosensitive layer of a thermodeveloping photosensitive material. The thermodeveloping photosensitive material is then loaded on a developing stage 20, and a voltage is impressed on rollers 2B and 3B, then a conductive exothermic layer generates heat, by which the photosensitive layer is heated and a mobile hydrophilic dye is released like an image. An image receiving material 21 is inserted into a roller pair 3 and roller pairs 2-4 are driven; at the same time, water is supplied and the thermodeveloping photosensitive material and the image receiving material are superposed while water is uniformly interposed between the same. Both materials are fed to a transfer stage 22. When electricity is conducted to the rollers 3B, 4B, the conductive exothermic layer generates heat, by which the dye fixing layer is heated and the hydrophilic dye released into the dye fixing layer on the image receiving material is moved and is transferred as a color image. The conductive exothermic layer is thus economized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal development transfer method and apparatus, and more particularly, to a thermal development photosensitive material having a photosensitive layer and a conductive heating layer that release all of a mobile hydrophilic dye from exposed or non-exposed areas when heated. The present invention relates to a new thermal development transfer method for obtaining a color image-fc using an image-receiving material having a dye-fixing layer, and an apparatus for carrying out this method.

The heat-developable photosensitive materials that can be used in the present invention include:
For example, as described in Japanese Patent Application No. Shojt-/3777R, at least a photosensitive silver halide, an organic silver salt oxidizing agent, a binder, and a photosensitive silver halide and/or an organic silver salt oxidizing agent. A photosensitive layer containing a dye-donating substance that is reducible to photosensitive silver halide and a dye-donating substance that reacts with a photosensitive silver halide or an organic silver salt oxidizing agent upon heating to release a mobile water-absorbing dye is transferred from an electrode. Examples include heat-developable photosensitive materials having a conductive heat-generating layer that generates heat when energized to completely heat the photosensitive layer. Such a heat-developable photosensitive material can simultaneously provide a silver image in the exposed area and a water-absorbing dye in the area corresponding to the silver image by performing thermal development after one image exposure. That is, when this heat-developable photosensitive material is imagewise exposed and then completely heated, an oxidation film (photoreaction) occurs between an organic silver salt oxidizing agent and a reducing dye-donating substance using the exposed photosensitive silver halide as a catalyst. occurs, producing a silver image in the exposed area. In this step, the dye-donating substance is oxidized by an organic silver salt oxidizing agent fL, and the oxidant is oxidized. This oxidant is cleaved in the presence of a dye-releasing aid. As a result, a mobile water-absorbing dye is released.As a result, a silver image and a mobile water-absorbing dye are obtained in the exposed area, and the water-absorbing dye is transferred to the image-receiving material. By doing this, a color image is obtained.If an autopositive emulsion is used as the photosensitive layer, a silver image and a mobile hydrophilic dye are obtained in the unexposed areas.

Further, as another heat-developable photosensitive material, for example, a patent application filed by the applicant of the present invention on
, No. 2t00♂, "Image Forming Method", at least photosensitive silver halide, a binder, and silver rokenide which is reducible and releases a dye by di-heating (photosensitive). A thermal developable material having a photosensitive layer having an immobile dye-donating substance (i) that does not react with heat from the edge of the blade and release a hydrophilic dye, together with a conductive heat generating layer that heats the photosensitive layer by generating heat when electricity is applied from an electrode. An example of such a photothermographic material is a heat-developable photosensitive material, which simply undergoes heat development after image exposure to form a silver image in the exposed area and a movable water-absorbing dye in the area other than the area corresponding to the silver image. Can be given at the same time.

That is, when using an immobile dye-providing substance that originally releases all of the hydrophilic dye, but no longer releases the hydrophilic dye when oxidized, how many images of the entire image of this heat-developable photosensitive material is produced, and when heated? When exposed to light, the photosensitive halogenated @ total catalyst is an organic silver salt as an oxidizing agent and/or a photosensitive silver halide and the reducing originally hydrophilic dye is completely released, but the oxidation process releases the water-absorbing dye. An oxidation-reduction reaction occurs between the immobile dye-donor and the immobile dye-donating substance, producing a silver image in the exposed area.In this step, the water-absorbing dye is originally released, but as it oxidizes, the hydrophilic dye is released. The immobile dye-donating substance that no longer releases becomes an oxidant, and as a result, the water-absorbing dye in the exposed area is no longer released, resulting in a non-rigid hydrophilic dye in the unexposed area. A color image is obtained by transferring the dye to the image-receiving material.When an autopositive emulsion is used as the photosensitive layer, an @1IiIl image is obtained in the unexposed area and a mobile dye is obtained in the exposed area. That will happen.

The conductive heating layer is made by grinding conductive material powder such as carphone, titanium, titanium oxide, etc. into fine powder using a ball mill or the like.
It can be obtained by mixing n with an aqueous gelatin solution or an aqueous PVA solution, applying the mixture to a support of a heat-developable photosensitive material, and drying the mixture. This conductive heating layer may be applied before or after coating the photosensitive layer. Alternatively, the conductive heating element film may be laminated to the support of the photothermographic material, or the conductive heating element film itself may be used as the support of the photothermographic material. It is preferable that the four-electroelectric heating layer be applied to the back side of the photothermographic material, but it may also be applied between the support and the photosensitive layer. Further, by not mixing fine powder of a conductive material into the emulsion forming the photosensitive layer, the emulsion may serve both as the photosensitive layer Mj and the conductive heating layer t. Further, the conductive heating layer may contain not only the conductive heating element but also all other substances useful for photographic properties and physical properties.

The image-receiving material (e) that can be used in the present invention is formed on an image-receiving material (NIIt): a support that can receive the dye released from the heat-developable photosensitive material by heat development. The image-receiving layer contains a dye fixing agent, such as a color patch mordant, which is released 71. All useful dyes can be selected and used depending on the physical properties of the dye, other components contained in the photothermographic material, transfer conditions, etc. For example, Tokugan ShojJ-/! High molecular weight polymeric mordants can be used, such as those described in 77 Riza Specifications.

The object of the present invention is to provide a method for better performing thermal development transfer using the above-mentioned π/2:thermal 'fA image-sensitive photosensitive material and an entire apparatus for carrying out the method. It is.

The present invention has been made to achieve the above-mentioned object, and the method includes a photosensitive layer that releases all of the movable hydrophilic color particles from the M tip part or the non-exposed part by heating, and conductive heat generation. Imagewise exposure of the photosensitive layer of a heat-developable photosensitive material having 6 layers? If the photosensitive layer is not exposed to light in an imagewise manner, the conductive heat-generating layer of the heat-developable photosensitive material is energized and heated -f' to form a movable hydrophilic dye in the form of an image on the photosensitive layer. Thereafter, the heat-developable photosensitive material is stacked face-to-face with the dye-fixing layer and the photosensitive layer on the image-receiving material having a color fixing layer, and the photothermographic material layered with the image-receiving material is layered. Transferring the hydrophilic dye formed in the image form to the dye fixing layer by applying electricity to the conductive heating layer of the photothermographic material, and then peeling off the entire image-receiving material from the photothermographic material. This is a heat development transfer method characterized in that a color image is obtained on the image-receiving material by the method. Is the device a hydrophilic dye that can be moved from exposed or unexposed areas by heating? A first electrode that supports the heat-developable photosensitive material and conducts electricity to the conductive heat-generating layer, in which the photosensitive layer of the heat-developable photosensitive material comprising an emitting photosensitive layer P and a conductive heat-generating layer is not imagewise exposed. and a heat-developable photosensitive material which is heated by applying electricity to the conductive heat generating node at the first electrode to form an entire image of a movable hydrophilic dye on the photosensitive layer, and an image-receiving material in which the dye is fixed. t
A heating device characterized in that it comprises a superimposing means for superimposing, and an electrode for supporting the photothermographic material and the image receiving material which have been superimposed by the superimposing means and for supplying current to the conductive heat generating layer. It is a development transfer device.

In this heat development transfer method, if a diffusion aid is added to the image receiving material having a dye fixing layer before superimposing it with the developed heat development photosensitive material, the transfer will be performed better. In the case of the diffusion aid method, during the production of the image-receiving material, all materials such as original slips, crystallized water, microcapsules, etc. are made into a water-like state by heat or eluted, and water or aqueous solution is exuded by fc pressure. Since it is applied as a diffusion aid, it is not necessary to add it when stacking. In the case of a method using water or a basic aqueous solution as a spreading aid, the spreading aid is applied to the image-receiving material during superposition. The water used as a diffusion aid is not limited to so-called pure water, but includes general drinking water, industrial water, and the like. It also includes water to which all substances useful for improving photographic or physical performance, such as bases and surfactants, have been added.

The water supply tray is used, for example, at a rate of 70% of the dry base weight of the total coating film of the photosensitive layer of the heat-developable photosensitive material and the dye fixing layer of the image-receiving material.
% or more, the dry weight from the amount of M at maximum swelling of all the above coating groups? It is sufficient if the amount is less than or equal to the subtracted value.

In the present invention, the heating temperature for the first time to form an image of a mobile hydrophilic dye during the exposure of a light-sensitive material without image-wise exposure is about 0'C to about x
It can be developed at zo' C, but especially from about 1100 C.
・About/Otsu O0C is useful. The heating time varies depending on the nature of the photothermographic material, but is approximately O0! Seconds to about 300 seconds are useful. The thermal temperature for transferring the image-shaped hydrophilic dye to the image-receiving material by combining the developed heat-developable photosensitive material and the image-receiving material is from around room temperature to a temperature not exceeding the development temperature. It is. When transferring at a temperature close to the development temperature, that is, at a temperature that allows development to proceed, the development temperature and development time must be set in consideration of the development progress during transfer. The relationship between development conditions and transfer conditions is, for example, development temperature/30°C for 20 seconds,
The transfer is performed for j seconds at a transfer temperature of 20°C. Usually, the difference between the development temperature and the transfer temperature is 1000 or more.

Heating for development and heating for transfer are performed by applying electricity to the conductive heating layer. Therefore, when electricity is applied, consideration is given to the rising process in which the conductive heating layer is heated and the temperature rises, and the rising process in which the photosensitive layer is heated and the temperature is rising by the heated conductive heating layer. It is necessary to set the voltage (i.e. current) and time. The degree of heat generated by the conductive heat generating layer varies depending on the amount of power drawn per unit area.

Therefore, the hot mass f8 that comes into contact with the electrode]7! The supplied current value varies depending on the width of the photosensitive material phase. If the widths are the same, call @! , vary the voltage value to be marked depending on the interval,
If the same current value is obtained and reduced, the heat generation will be the same 8 degrees.

If the spacing between the electrodes used for energization during development is equal to the spacing between the electrodes used for energization during transfer, the voltage applied during transfer should be
Well, the voltage applied during maintenance should also be set low! Processing can be performed at a lower transfer temperature than the transfer temperature.

In addition, if we take advantage of the time required for the rising process of the applied power λ to increase the temperature, the applied voltage λ, that is, even if the current value in this case is the same, it is possible to make the transfer temperature lower than in the current thermal insulation summer. can. For example, when making paper from 7 to 7 in the time until the temperature rise is completed, the energization during development is set to 20 seconds, and the energization during transfer is set to 20 seconds. If it is set to i-6 to 7 seconds, the transfer temperature will be lower than the development temperature.

Electricity is supplied to the conductive heating layer by bringing the photothermographic material into contact with parallel electrodes. The electrodes may be provided parallel to the width direction of the conductive heating layer, or may be provided at right angles to the width direction. When a long photothermographic material is fed intermittently at predetermined intervals or continuously for processing, it is preferable to use an electrode provided perpendicular to the traveling direction of the photothermographic material. The electrodes may also serve as means for supporting the photothermographic material, or may serve as means for transporting the photothermographic material. Furthermore, it may also serve as a means for overlapping the photothermographic material and the image-receiving material. In order to serve as a conveyance means or a stacking means, it is preferable to use a roller whose electrodes are entirely conductive.

The electrode used for development and the electrode used for transfer may be the same electrode. It is brought into contact with an electrode and is heated and developed'1
1. The heat-developable photosensitive material may be moved to the overlapping portion with the image-receiving material and overlaid with the image-receiving material, and then brought into contact with the same electrode again and heated with electricity to perform transfer. In this case, it is preferable that the electrodes be constituted by rollers, so that they also serve as conveyance means, and one of the electrodes is made to serve also as overlapping means.

When a conductive heat generating layer is applied together with a photosensitive layer, an image receiving material that is shorter in width or length than the photothermographic material is overlaid, and the electrodes are placed on both edges or ends of the photothermographic material. A structure that makes contact with the surface of the part can be used. In addition, when a conductive heat generating layer is applied between the support and the photosensitive layer, the conductive body for the conductive heat generating layer is applied to the front or back side of both edges of the heat-developable material, and the electrodes are connected to this layer. A structure that allows contact with the current carrying body can be used.

Hereinafter, failure #3A' will be specifically explained in Examples.

FIG. 1 is a side view showing the main parts of an embodiment apparatus in which a developing trap electrode and a transfer electrode are provided separately. The heat-developable photosensitive material used in this example apparatus has a photosensitive layer on the front surface and a conductive heating layer on the back surface. This embodiment device includes: roller pair, roller pair 3, roller pair ≠, guide plate j1, guide plate t5, guide plate 7, guide plate r5, light source, mirror box lO1 condenser lens//, original image carrier/2, Imaging lens/3, color correction filter/4j
- Consists of shutter lj, %L source/1% power source/7, and water supply nozzle/♂. The roller pair l is used to feed the photothermographic material to the exposure stage lid.
The rollers /A and /B that make up the entire structure are rubber rollers. The roller pair 2 serves as a feeding means and an electrode, and the rollers 2A constituting the roller pair 2 are heat-resistant rubber rollers, and the roller λB is a metal roller. The roller pair 3 serves as a feeding means, an overlapping means, and an electrode, and the roller pair 3? Construction: The roller 3A is a heat-resistant rubber roller, and the roller 3B is a metal roller. The roller pair l/l serves as the feeding means and the vL pole, and the roller ≠A constituting the roller pair ≠ is a heat-resistant rubber roller, and the roller ≠B is a metal roller. Roller 2B and roller 3B have a power supply/B is a relay switch/
A first electrode connected via xATh is configured.

A power supply 7 is connected to the row 23B and the roller 23B via a relay switch 7A2 to form a first electrode. The water supply nozzle /f is designed to supply a predetermined amount of water as a diffusion aid between the photosensitive layer of the developed photothermographic material and the dye fixing layer of the image receiving material. Each roller pair 11
λ, 3, ≠ are each driven by n.

A complete explanation will be given of how the misfiring EA is carried out using the f'L device configured as shown in Fig. m1. Transfer the transparent original O to the original carrier 1.
When the heat-developable photosensitive material is loaded into the roller pair 2 and inserted into the gold roller pair/, the roller pair l and the roller pair k are driven, and the photothermographic material is fed n, passes over the guide plate j, and its tip is supported by the roller pair λ. It advances until it is loaded onto the exposure stage. Transparent originals such as positive or negative photographic film are OK because the light is emitted from the light source and is uniformized using a mirror box/θ.
A condenser lens condenses the light f'L and irradiates it.

The image of the original O, which has been irradiated with light f', is formed on the photosensitive layer of the heat-developable photosensitive material on the exposure stage/1 by the imaging lens/3, and the images are B (blue), G ( green), ■(red)
Alternatively, the exposure is controlled via a color correction film l≠ such as C (cyan), M (magenta), or Y (yellow) and a shutter irq, and the photothermographic material is exposed to light δn. Imagewise exposure of the heat-developable photosensitive material is completed. The center, roller pair 2, and roller pair 3 are driven, and the heat-developable photosensitive material is fed, passes completely over the guide plate 2, and the tip is placed on the roller pair 3. It advances until it is supported and loaded onto the developing stage 20. In this state, the power supply/& is the relay switch/
7A is applied to rollers 2B and 3B, which serve as electrodes of z/, for a time of f'1.1ζ.9, the conductive heating layer on the back side of the heat-developable photosensitive material generates heat, and the photosensitive layer on the front side is heated n.
The mobile hydrophilic ninefolds are released in an imagewise manner. When the development is completed, the image-receiving material 21, which has been kept on standby on the guide plate 7, is inserted into the roller pair 3, and the roller pairs 10-1, 2-3, and 2-3 are driven, and at the same time, the image-receiving material 21, which has been kept on standby on the guide plate 7, is driven. A predetermined amount of water is supplied. Supplied from the water supply nozzle
The water spreads along the overlapping line of the heat-developable photosensitive material and image-receiving material due to the capillary effect. Form. The heat-developable photosensitive material and the image-receiving material are superimposed by a pair of rollers 3 with water evenly interposed between them, and are fed to a transfer stage 2, which traces the entire top of the guide plate r and advances with its tip supported by the pair of rollers ≠. .2 is loaded. In this state, set ft'7 (voltage power supply /7 is applied to the row 23B and roller pB, which becomes the λth electrode by the relay switch /7A -i''L, is applied for a period of time, then thermal development is performed. The conductive heating layer on the back side of the photosensitive material generates heat, and the photosensitive layer on the front side and the dye fixing layer of the image-receiving material in contact with this photosensitive layer are heated, and the hydrophilic dye released into the photosensitive layer is released into the Mizukura-mediated diffusion aid. The color image is transferred to the dye fixing layer and transferred to the image receiving material as a color image.
Roller pair 3 and roller pair Hiro are driven, M, and n
The photothermographic material and the image-receiving material are discharged as they are;
When the image-receiving material is peeled off from the heat-developable photosensitive material, a color photograph can be obtained on the image-receiving material.

FIG. 2 is a side view showing the main parts of an embodiment apparatus in which the same electrode serves as the 'rJL pole for development and the electrode for transfer. The photothermographic material used in this embodiment apparatus is the same as that used in the embodiment shown in FIG. However, the image-receiving material may be one that melts into a pail-like shape when heated, or one that previously contains a diffusion aid as a diffusion aid that releases all of the water when heated. Difficulty) The embodiment device has a roller pair 30, a roller pair 3/, a guide plate 3,! , guide plate 33, guide plate 7, power supply jlI-
It consists of The roller pair 30 serves both as a feeding means and an electrode, and the roller 30A that makes up the entire roller pair 30 is a heat-resistant rubber roller, and the roller 30BIrl is a metal roller. The roller pair 3/ has a feeding means, a wheel alignment means, an electrode, and a function σ], and the roller pair 3/all the rollers J/
A is a heat-resistant rubber roller, and roller 3/f3 is a metal roller. The roller 30'f3 and the roller j/B are supplied with different voltages, and the power source 3≠ is connected via a switchable relay switch 33f, so that the roller 30'f3 and the roller j/B are configured to serve as the first (7) electrode and the second electrode. I'm here.

The manner in which the present invention is implemented using an apparatus configured as shown in FIG. 2 will be described. When computer data or a video signal is scanned by changing the light and inserted into a pair of gold rollers 3θ of a heat-developable photosensitive material for image-wise exposure, the pair of rollers 3θ and the pair of rollers 31 are driven and the photothermographic material is It passes through the upper part of the guide plate 32 and advances until the tip is supported by the roller pair 3/.

In this state, switch the relay switch 3! to the power supply terminal 317A side of the voltage set for the development of the power supply 3! By operating for a set time, a developing voltage is applied to the roller 30f3 and the roller 3/B, and the conductive heating layer, which is the main part of the heat-developable photosensitive material, generates heat, and the photosensitive layer on the surface is heated, and the movable hydrophilic layer is heated. The color pigment is released in an imagewise manner.

When the development is completed, the roller pair 30 and the roller pair 3 are applied again.
/ is driven by the heat development method 1. The developed photosensitive material is placed on the guide plate 3.
3 and stops when the n-wave end is sandwiched between the logi and the 3. After 6, the image-receiving material 3 which had been left in ambush on the guide plate 7 is inserted into the roller pair 3/n5.
/, the roller pair 3θ is reversely driven, and the photothermographic material H and the receiving material H are overlapped and fed by the roller pair 3/.
The tip passes over three guide plates and is supported by a pair of rollers 30, and advances at f'L,i1. In this state, the relay switch 3j is operated for a set time to the power supply terminal 34Lf3 side of the voltage set for transfer of the power supply J4', thereby transferring the roller 30B.
When a voltage for transfer is applied to the roller 3/B, the heat-generating portion on the back side of the heat-developable photosensitive material generates heat. When heated, the meltable substance previously placed in the dye fixing station releases moisture and releases onto the photosensitive layer. The hydrophilic dye moves through the water to the dye register I constant layer and is transferred to the image receiver as a color image. After that, the rollers 2 and 30 and the rollers 3 and 3 work hard, and the heat-developable photosensitive material and the image-receiving material are discharged in a superimposed state. Ru. By peeling off the color notes from the heat-developable photosensitive material, color notebooks will cover the image-receiving material.

The heat-developable photosensitive material used in the examples shown in FIGS. 1 and 2 above has a length between the electrodes of gj, a narrow width in contact with the electrode, and a resistance value of too Ω in the long direction of conductive heat generation. be. Approximately 2 times the electrode during development! Apply the voltage of ■ and
heated to. During the transfer, a total voltage of about /10 V was applied and heating was performed at /lo'Ct1c. Therefore, the current in development is 0.2/A, and the current in transfer is θ, /A
Met.

As mentioned above, the present invention is an apparatus for implementing a novel thermal development transfer method, and includes:
The transfer color image can be obtained by the simple method of heating kT and b for both the image transfer and transfer, and in particular, the conductive heating layer is not necessary for image-receiving materials that can obtain a high number of images such as color photographs and hard copies. The practical effects are significant.

[Brief explanation of the drawing]

FIG. 7 is a side view of the main parts showing an example of a thermal development transfer apparatus for carrying out the present invention, and FIG. 2 is a side view of the main parts showing another embodiment of the same apparatus. /,ノ,3,tl 30.3/...roller pair,
! B, '3 B, Gu B, 30B, 3/f3・
...Metal roller /l,, /7.3 Hiroshi...' Kamegen procedural amendment letter Mr. Commissioner of the Patent Office 1, case display Showa! Patent Application No. 5≠731
No. 2, Title of the invention Thermal development transfer method and apparatus 3, Relationship with the case of the person making the amendment Patent applicant 4, Subject of the amendment Column 5, "Detailed explanation of the invention" of the specification, Contents of the amendment/) Specification Correct “conductive heating layer” in line r of page 7 to “conductive heating layer”. , 2) "Water supply nozzle" and "Water supply nozzle/do" on page 20, line 20 to page 1♂, line 1 of the specification have been corrected. 3) “Light change” on page 20, line 3 of the specification? Correct to “light conversion”.

Claims (1)

[Scope of Claims] /) imagewise exposing the photosensitive layer of a heat-developable photosensitive material having a photosensitive layer and a conductive heating layer that release a mobile hydrophilic dye from exposed or non-exposed areas when heated; When the photosensitive layer is not imagewise exposed f'L, a movable hydrophilic dye is formed on the photosensitive layer in the form of an image by applying electricity to and heating the conductive heating layer of the heat-developable photosensitive material, and then , the heat-developable photosensitive material is superimposed on an image-receiving material having a dye-fixed N, with the dye-fixed layer and the photosensitive layer facing each other, and the conductivity of the heat-developable photosensitive material that is superimposed on the image-receiving material is 2) Transferring the hydrophilic dye formed in the image form to the dye identification layer by applying electricity to the heat generating layer and heating it, and then peeling off the image receiving material from the photothermographic material. The current value applied to the four-electroelectric heating layer when moving the image-formed dye to the dye fixing layer is higher than the value of the current applied to the conductive heating layer when forming the mobile hydrophilic dye in the form of an image. 2. The thermal development transfer method according to claim 1, wherein: 3) When forming a movable hydrophilic dye in the form of an image on the photosensitive layer, the conductive heat generating layer is longer than the current application time to the conductive heat generating layer when the image form of the dye is transferred to the fixed dye layer. 82. The heat development and transfer method according to claim 81, wherein the time period during which the current is applied to is shortened. There is no imagewise exposure of the photosensitive layer of a photothermographic material having a photosensitive layer and a conductive heating layer that release all of a mobile hydrophilic dye from exposed or non-exposed areas when heated.
The heat-developable photosensitive material is supported, and the process proceeds to the above-mentioned (4) heat generation process. a superimposing means for superimposing a heat-developable photosensitive material having a movable hydrophilic dye formed in the form of an image on the photosensitive layer and an image receiving material having a dye identification layer; A heat development transfer device comprising: a second electrode that supports the heat-developable photosensitive material and the image-receiving material and supplies electricity to the conductive heating layer. 4. The thermal development transfer device according to claim 3, wherein all the same electrodes serve as the first electrode and the second electrode.