DE1772302C3 - Electrophotographic process - Google Patents

Description

3 4

enables the creation of printing forms in a short time. Transfer plate when exposed to light. A dividing

This procedure is intended to adapt to the voltage of the parts is then carried out by peeling off the iitho-

be very flexible in the most varied of conditions. graphic plate from the one bearing the original image

In a method of the type mentioned at the outset, the document is reached. The result is a viscous one

this object is achieved in that either the 5 oleophilic image on the surface of the hydrophilic

Imaged hydrophilic image-receiving plate that accepts oily inks,

material itself or a further hydrophilic It was stated that a viscous, after

Image receiving material transferred image as hthogra- the process generated image is hydrophobic and therefore

fish printing form is used. binds oily printing inks. It was also

As indicated in DT-PS 15 22 744, the 10 is directed that the production of such images on the recording material an electric field from a surface of a hydrophilic base is used while it is exposed imagewise. When the image configuration obtained is formed, the layer support is separated from the image-receiving thographic printing process. In the case of a single material, the light-sensitive layer breaks along position of the correct image selection, it is possible to produce the lines determined by the light image, whereby a lithographic printing plate is produced with which a part of the layer is independently transferred to the image-receiving material, a negative or a positive pressure, while you Rest on the layer - made from the type of original image - remains so that a can be applied to the surface. Furthermore, the high sensitivity enables a positive image and a negative image, which is the photosensitive image used in the process, is on the other. At least the substrate or the image is transparent, so that a loading mechanism such as e.g. B. a projection system collation through one of these parts through men with transparent templates,
can. Also, one or both of the parts used to make the lithographic printing for a conductive material. The recording material used in the electrophotographic process can have special electrodes on opposite sides of each other and the recording materials used are explained in more detail in the set sides of a non-conductive layer support of the above-mentioned DT-PS 15 22 744. The and a non-conductive image receiving material also keep the separated hydrophilic image receiving material. Here, too, either one or both of the viscous image is then used in a lithographic combination of electrodes and the associated printing process,
The lithographic printing form or the hydrophotosensitive layer on either side of the Anphile plate will not be part of the recording order. The resulting positive material can be used for their production or negative image on the surface of the image- various embodiments are applied where the receiving material is naturally oleophilic and the. In one embodiment, both can bind to oily inks. The hydrophilic image-receiving material imaged on the substrate and seen on the image-receiving material is then printed onto the surface of a lithographic plate, graphic printing press and lithographically transferred by printing from its respective onto a printing cylinder of a conventional lithographic substrate. The recording material is used for graphic printing. The printing process is brought into contact with the surface of a lithographic plate conventionally borrowed with commercially available wetting solutions 40, for example, and lithographic inks are carried out. The sub-hydrophobic image with a paper or a rough aluminum easily adopts the oleophilic printing position, and pressure is exerted in that the colors take on such a color. arrangement formed between two steel rollers

Other embodiments are also possible. The one during the transfer step

where the lithographic base does not have a part 45 acting force is generally limited and

of the recording material. In such a case, due to the lithographic flap selected in each case,

Embodiment is the received positive or true. For example, if paper is used, see below

negative image on the surface of the support can apply a pressure of 141 kg / cm before a

or the image receiving material has an extensive damaging effect on the printing form itself,

contact with a conventional lithographic plate, 50 The image is generally produced within this

z. A paper, and the image is effectively transferred to rich. At another similar

this embodiment of the image transfer to the borrowed by the action of an external pressure

carry. In a similar second embodiment, the production of the lithographic printing form is

is the image to be printed in two-dimensional printing recording material with a lithographic

brought into contact with the lithographic plate, 55 brought plate into surface contact. By

and the image is z. B. by a heat source putting the image in a sticky state, e.g. B.

made sticky. The sticky image is applied by applying heat or a solvent

transferred the lithographic plate. With a third vapor, the hydrophobic image is selective to one

Embodiment of the method of making hydrophilic plate transferred.

a lithographic printing form is the one with the 60. In a third embodiment that is on Recording material produced an image on the image of the surface of the support or of the image receiving material or positive or negative image generated on the substrate in capture material Surface contact with a conventional one through the action of an activating liquid lithographic plate for forming a second recording in a manner similar to that previously described brought with the lithography 65 activated. A lithographic plate is over the image see plate then serves as image receiving material. placed so that a second recording material ge-through proper adjustment of the applied voltage at which the lithographic plate becomes an image the image is used on the surface of the lithographic receiving material. At this arrangement is

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creates an electric field. During the exposure to radiation energy, which is indicated by the lines 29

The effect of the electric field is that it is sensitive to light. At the same time, an electric field acts, which

Liche SchicKt is generated evenly with electromagnetic ches by the voltage source 30.

Radiation exposed. Is it possible to do this with an image? By the properties of the light-sensitive

See image receiving material as a component 5 layer 22 breaks the layer along the through the

of the second arrangement is used, electromagnetic radiation is given to certain lines, where-

in contrast to the initial image generation, an image 32 appears when the arrangement is separated

set polarity selected. If the image-receiving material 26 is created while the

If the layer carrier provided is used, then the complementary image corresponds to 31 on the layer carrier 21

The polarity chosen remains that of the initial image. Is the image receiving material a lithographic

generation. While retaining the adjacent chipboard, for example a piece of paper, the result is

In this preferred embodiment, the lithographic plate is of the arrangement

voltage deducted, with the image now on the upper printing forme directly.

adhered to the surface of the lithographic plate. The acti- In F i g. 4 a is a lithographic plate in the form The liquid can evaporate, leaving a paper blue 41 on the surface The image 32 is present, for example, through the action of heat in the image receiving material 26 fixed. This then results in an image placed on it, which is represented by the in FIG. 3 shown of the original image, which was created by exposure to active light. Through the pressure roller 42 fourth transfer on the lithographic plate, a print is made on the arrangement shown would. »° practiced. F i g. 4 b shows the separation phase of the picture

The invention is based on in the drawing transfer process, in which the lithographic

illustrated embodiments described. There plate 41 of the image 32 and the image receiving

shows material 26 is being peeled off, resulting in a tough

F i g. 1 shows the section of a used recording liquid oleophilic image 45 on the surface of

materials, »5 lithographic plate 41 results, which the printing

F i g. 2 forms the section of another embodiment,

form of a recording material, FIG. 5 shows the production of a positive-positive

F i g. 3 the side section of a recording printing form by light activation. After the ore material to show the exposure and its movement of the image 31 on the surface of the layer effect The image-receiving material is applied to the light-sensitive layer, support 21 (FIG. 3)

F i g. 4 a and 4 b a method for transmission with its electrode removed from the arrangement

according to FIG. 3 generated image on the upper and a second combination of a transfer

surface of a lithographic plate and generation electrode 51 and a lithographic plate 53

F i g. 5 another embodiment of the over- used instead, so that the in F i g. 5 wear of the generated image on the surface of a 35 pointed array. During exposure lithographic plate. a voltage of the voltage source 60 at the so

1 shows a layer support 11 and a light- generated recording material the upper-sensitive layer 12. This consists of the surface of the electrode 25 and layer substrate 21, which is a light-sensitive pigment 13, which is uniformly dispersed with an electromagnetic binder 14 in a formed arrangement. Illuminated above the light-sensitive radiation, the layer 12 borrowed by the lines is located as the third layer, which is indicated 61. When separated, the image is from the image receiving material 16. The entire arrangement surface of the substrate 21 on the surface is referred to as recording material in which the plate 53 is transferred. The obtained lithographic illustrated embodiment consist of the layer printing form consists of a viscous hydroträgerll and the image receiving material 16 of a 45 phobic image 31 on the surface of a lithographically electrically conductive material such. B. conductive fishing plate 53. which in the present case made of Pa cell glass, at least one surface is optically pier

is clear to allow exposure of layer 12. Any suitable material may be used for lithographic

enable. Printing form can be used. The surface of the

The in F i g. The arrangement shown in Fig. 1 is one of the 50 printing plates which is inherently hydrophilic and of the simplest forms of recording material, one such that it is easily a water-repellent sheet, other and preferably used arrangement, which is firmly adhered to or by Drackfarin F i g. 2 shown In this embodiment, ben is not peeled off wax! or due to the wetting of a non-conductive layer substrate 21 on its upper solution during the printing process, it is not washed off with a light-sensitive layer 22. Furthermore, the can not be seen to the Bfld. As in FIG. 1, the light-sensitive area of the printing form can easily be wetted with the coating of one of the various already described wetting solutions and holds an aqueous substance composition. It is in the form of F3m on its surface, this non-existent case of photosensitive pigments being removed or formed by the lithographic printing ink 23, which can be displaced 60 dispersed in a binder 24. IKe pressure plate can be aas. Above the highly sensitive layer is any of the known substances, including the image receiving material 26. The non-conductive, for example, flexible waterproof paper, synthetic layer carrier 21 is on the sealer back with a fabric or thin meta-picture. Conductive electrode 25 is provided, while the method is being carried out, any sealing material 26 can also be used with a suitable electrode. Typical trode 27 carries such solutions contain em%

FIG. 3 shows the sirg of a selective composition in water, Gbaann in washing the arrangement shown in FIG. 2 with water, glycerin in water or isopropyl alcohol in

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Water. Distilled water can also be used as an arrangement. A method of making it happen wetting solution can be used. Other typical low cohesive force in the photosensitive Solutions are in US Patent 31 07 169 loading layer is that relatively soft materials with wrote. They can contain other ingredients, low molecular weight can be used. So for example formaldehyde, and if glycerine does not exist, for example, in one of a single com because of its homogeneous layer containing hygroscopic components, it can have a mono-nature are added and thus by absorbent compound or a polymer with low tion of water extend the period while molecular weight along with a Lewis acid whose surface of the printing form is hydrophilic for high light sensitivity, len properties. The addition of formaldehyde can also be used in a homogeneous layer this effect works at the same time. Hence, Benet's two or more components in solid solution become one tion solutions with glycerine or formaldehyde additive or both components from a substance low Sets or mixtures thereof preferably use molecular weight, so that the layer the del, because the resulting printing form can have the desired low cohesive force. This can Their use compared with other lubricants also in the production of a heterogeneous lighting solution treated printing forms relatively sensitive layer can be realized. The Binlange be stored. Solutions with gum arabic in the heterogeneous arrangement can Cumulative are also very effective, since they themselves are sensitive to light, but this is not necessary liihografischen printing forms their hydro-agile, so that also substances like microcrystalline Phile properties relatively long after removal of ao wax, paraffin wax, polyethylene with little Maintained from the press, so that the respective molecular weight as well as other polymers with low printing forme without additional treatment with a like molecular weight as a binder alone after Networking solution can be reused. their physical properties and their insulating

Any suitable lithographic printing ink can be selected and used to produce the desired effect. Typical colors of this type and their 35 without regard to their sensitivity to light. Properties are in "Ink Technology for Printers This also applies to a homogeneous arrangement consisting of two components and students" by EA Apps, 1963, Part II, in which no light chap. 11. The inks have the same sensitive substances with the desired basic physical structure as good letterpress inks see properties in solid solution with light and they consist in their simplest form of a 30 sensitive substances can be used.
Pigment mixture that is used in a lithographic It has already been stated that the layer varnish is dispersed, for example in a thickened carrier and / or the image receiving material or linseed oil. The lithographic oily printing ink is sen base can be conductive and for this purpose made of oleophilic and adheres to the hydrophobic image. made of conductive cell glass. By using it, it is repelled by the hydrophilic surface parts that do not belong to the picture. the result is usually a relatively weak base.

Any suitable photosensitive pigment can therefore be made possible by a non-conductive support

be used in the new method, and an image receiving material with a background

his selection largely depends on his light-sensitive electrode the use of solid non-conductive

and its sensitivity spectrum as well as 40 of the polymers such as polyethylene, polypropylene, poly-

accordingly of the desired contrast of the ethylene terephthalate, cellulose acetate, a vinyl chloride

Image, from the use of a heterogeneous or vinylidene chloride copolymer as well as similar substances,

Homogeneous Arrangement and Similar Considerations This type of solid polymer not only forms a strong one

depends. Underlay for the generated images, but also a

For the heterogeneous arrangement, the light-electrical barrier layer between the electrodes and sensitive particles itself can consist of one or more layers of image material, which avoid electrical flashovers within the known light-sensitive pigments within the arrangement. If they are of a lithonic or inorganic nature and are produced with graphic printing form directly, any suitable non-conductive resin in dispersion, receiving material in the form of a hydrophilic solid solution or interpolymerized together to form a lithographic plate, as brought together with the resin not lichtnpfrnd- z. B. paper, rough aluminum, etc., as must already be auslich. The resin is said to be the dispersion of the part- was carried out.

make it easier to avoid undesired reactions between the binder and the photosensitive pigment, the following preferred exemplary embodiments serve to explain the process further. At or between the light-sensitive pigment and 55 parts and percentages relate, not to avoid other activating agents and otherwise otherwise specified, to the weight of intended purposes. Such resins are poly-_. . . ^. ethylene, polypropylene, polyamides, polymethacrylates, »eispieieitmau polyacrylates, polyvinyl chlorides, polyvinyl acetates, a commercial metallic phthalocyanine, polystyrene, polysiloxanes, CrJorkantschukarten. Poly-60 is first converted into entacrylonitrH by leaching in acetone. Epoxy resins, phenols, hydrocarbon removal of organic compounds, refined resins and other natural resins such as rosin- Since this step results in a less sensitive crystalline derivatives as well as mixtures and copolymers this ß-farm , the desired α-form is made by these substances. Dissolve 100 grams of the ß-Fotm in 600 ecm

As has already been stated, the light-sensitive sulfuric acid, precipitations in 3000 ecm of ice water and

The layer exhibited a relatively low cohesive force as a neutralization wash with water. The

Own coating or after activation. Purified e-Pta & s! Ocyaam obtained for 6 days

of course, for homogeneous and heterogeneous

Desalted water, vacuum filtered, washed with water and finally with methanol until the initial filtrate is clear and gives the x-form of phthalocyanine. After vacuum drying to remove residual methanol, the x-form of the phthalocyanine is used to produce an image layer. according to the following procedure: 2 grams of a microcrystalline wax with a melting point of about 101 ° C and 0.5 grams of a microcrystalline wax with a melting point of about 65 ° C are mixed with a three-component mixture of 1.25 grams of the above pure x-phthalocyanine, 0.8 grams of 1 - (4'-methyl-5'-chlorazobenzene-2'-sulfonic acid) 2-hydroxy-3-naphthenic acid C I. No. 5865s and 1.25 grams of 1,2 ^ 5,6-di (C C'-Diphenyl) -th.azol-anthrach.non CI Nr 67 300, m 60 ecm reagent-petroleum ether mixed This preparation is in a glass vessel of 0.47 l with a large opening together m, t 0, 24 1 porcelain balls) Tr '? n ^{Cm you, rch} _K ^me * ^se 5 entered. The lid of the vessel is sealed to prevent contamination. The mixture is then milled at 90 revolutions per minute for about 24 hours. Then another 20 ecm petroleum ether are added. The mill is then rotated for an additional 15 minutes. A uniform coating of the resulting paste is applied to the top of a 0.05 mm thick polyethylene terephthalate sheet with a spreader stick. The coating is air dried at room temperature for about 5 minutes. Its thickness is measured to be about 2.5 milon gV. The air-dried support is then

e | * rode fasten,, cen, e, "er 5- .ig" Ak, fvi " _ro "_g's solution of a styrene copolymer in a kerosene component is applied along one edge of the horizontally arranged substrate. A second 0.05 µm thick polyethylene terephthalal film is applied to the layer coating with the activating solution, and the activating solution is evenly distributed over the carrier by rolling a rubber roller once over the image receiving material. A sheet of electrically conductive black paper, which serves as an opaque electrode, is placed over the second film. A voltage of about 10,000 volts is applied to the clear and opaque electrodes through a 1250 megohm resistor, with the positive pole being on the glass electrode. About 5 seconds after switching on the voltage, the multiple plate arrangement is exposed to a light image by projecting a negative continuously tinted image through the transparent glass electrode hSrcfa. The exposure is about 0.54 lux S? Of a lamp at about 2800 ° K for a duration of about 4 seconds, which results in a total of about 2.16 lux of energy the opaque electrode removed by hand while the voltage of 10 000 Voh ringSS HeibL After the separation there is a copy of the original negative and a reversal or a positive image on the image receiving material. Both images are

"He, Hhop ^" _M. Paper i. Brought into contact and passed at a speed of 2.54 cm / sec between steel rollers of 7.6 cm diameter, which are tensioned with a force of 726 kg. The total force acting is 143 kg / cm. An impression of each image: is transferred in this way onto the respective lithographic plate. Each imaged lithographic printing form is then inserted into a conventional lithographic printing press and used for printing using conventional wetting solutions and lithographic inks]

B e i s ρ i e 1 e III and IV

The method described above is used to separate the image receiving material from

Layer support repeated. The one with the generated image

provided areas are printed on in the manner described with a lithographic printing

rough aluminum plate brought into contact, unc

ao there will be an imprint of the respective image on this «

transfer. The aluminum pressure formers obtained meet the requirements of

Printing technology.

as Examples V and VI

According to Examples I and II, a layer paste is produced and an even surface train from this paste is applied to a 0.05 mm thick ethylene terephthalate film, which on Glass electrode is attached. The lic 'layer is made with a 5% solution benen type activated, after which another slide al;

the

? ^Ρ

deposited An da «Α, Γί, ί 1, ^g p

TOOC »Vollübe Let M F ^hnun 8 ^smateria J to theΓ electrodes Ζ, Γ» w ^d T V - ^M ? F and 1 da TfTc? I Jl, Y " ? *" · ^At P ^ie ! ^e "

^ through ch i _ee ^ E ^ eSroct ° ^ P ^{oslt ™} haben ^d f E? wa ί «SSSJf t Z 1 I , ^negatl ? ^ ^lcktrode S ^ dielnordnun, ί ^AnSChaltun | ndemι ei ^ ne _E atΪ? « ^" 7 V? by dfe tra ^ sSSe GlatTl ', H

projected ^ D ^ BeTirLt ,,? T -? ^C about a ^ S seconds S ^ t ⁸ % ■ ??

3 seconds ™ 5 S £? £
RECEPTION MATTER ™ 5? T ^g u ™? ™ voT Hand SzLe _n ί-ΐ. ^and " ^r ? ^sl | ^htl g ^e IchalS bleftf n5 dST? ^S P *

Examples Vn and VID

11 12

repeated. The images provided with the resistance to the positive pole of the voltage are connected under pressure with a roughened lithographic source. A voltage of approximately aluminum plates similar to that in Examples I 7000 volts is brought into contact with this multilayer arrangement and II, and an imprint of the is switched on. After 5 seconds, the image is transferred to the aluminum plate, together with the opaque material. 7000 volts is still switched on. On the surface is the 1 e IX and X ^ ^er lithographic aluminum base

a viscous picture. The picture is due to this

On the surface of an image receiving material, heating the plate to a temperature of 135 ° C

and a support are fixed as in Example I, creating a lithographic printing form

and II images are generated. After the breakup and the surrender.

Fixing the images are each in direct B e i s e D i 1 XII
Contact with the surface of a lithographic

Brought aluminum plate. The obtained more- 15 5 grams of a microcrystalline wax with

Layered arrangements will be at 121 ° C with about a melting point of about 71 ° C

Use a normal iron for 1 minute to make a three-component mixture of 3 grams of metal-free

heats, whereby the acting force is only due to x-phthalocyanine from Example I, 2 grams of a red

the weight of the iron is caused. A pigment and 1 gram of a yellow pigment

Imprint of each picture is mixed on the 20 ment fabric in 100 ecm petroleum ether, the

respective lithographic plate is cleaned with a clay filter to form one. This preparation

Transfer printing form. is about 90 revolutions per minute

. Ground in a ball mill for 20 hours. the

Example Xi paste obtained is at a temperature of about

A layer paste is heated according to the method of 25 65 ° C and then prepared from Examples I and II to room temperature. A more evenly chilled. A uniform coating of the paste is then applied to the surface of a 0.05 mm thick polyethylene terephthalate film of the type mentioned with a spreading stick on the surface of a 0.05 mm thick film and applied at Zimmer and results in a light-sensitive Layer air dried at temperature for about 5 minutes. The 30 about 2.5 microns thick. At Zimmerlem thickness, the light-sensitive layer is air-dried at around temperature for about 5 minutes. The so measured 5 microns. The air-dried support is then coated with the photosensitive layer on a glass electrode as in the foregoing and then fixed on top of the electrically conductive surface, and the surface of the layer is fixed with a transparent glass electrode. An activated solvent that has a viscosity of about the activation solution similar to that of Examples I 0.65 centistokes. This fabric is applied along a and II, and a 0.05 mm thick edge of the backing is applied. The layer of image receiving material is placed on top of the image layer with a lithographic aluminum plate. An opaque, conductive surface is placed on the image receiving cover, and a rubber roller is passed over the free upper material, whereby the activating agent is black paper electrode and completes which is evenly distributed over the layer. A sheet of recording material. A voltage of about electrically conductive black paper is connected to the electrode arrangement over the 7000 volts is connected over a resistor of 51 meg aluminum plate and serves as an opaque ohm to the electrode arrangement. A voltage of around 3000 volts is applied when the positive pole is on the glass electrode. Approximately 45 across a resistor of 51 megohms to the electrode, 5 seconds after switching on the voltage, the electrode arrangement is switched on, the glass electrode arrangement being exposed to a light image in which the electrode is positive and the black electrode is negative. a negative, continuously toned image through which a transparent glass electrode is projected about 5 seconds after the voltage is switched on. an exposure is carried out by means of a negative The exposure is about 0.54 lux for 5 seconds through the continuous tinted image, which results in about 2.7 luxsec. Glass electrode visible for about 3 seconds is projected through it. Dk after exposure, the image receiving material is about 5 seconds long together with the opaque electrode of 1.08 lux. About 3 seconds after exposure, the hand is pulled off, the voltage of 7000 volts keeping the aluminum film receiving material switched on along with it. After this separation, the opaque electrode is located on the surface of the image receiving material when the voltage is switched on. On the surface of the litho an image. This is accomplished by heating with a graphical Hei aluminum plate is to recognize an image, Ben fixed plate to a temperature of 71 ⁰ C. this is fixed by heating to a temperature of 71 ° C on a hot plate. This ausnium plate is connected to the negative pole of the chip 60 guide example! shows the direct type of manufacture connected to power source. A thin layer of Petra - a lithographic printing form with an image on the ether, which was also used to produce the image material - the surface of a lithographic aluminum paste, is used as a coating on the surface plate.

applied to the aluminum plate, and the image of the example ΧΤΠ

Image receiving material comes with its 65 ™ Place the pad on the opaque electrode. The procedure from Example ΧΠ is repeated

the petroleum ether layer is applied The conductive, whereby instead of the aluminum plate, a lithographic

Opaque electrode is used over a S1 -Megohm- fic plate made of paper. The during

13 14

The voltage turned on exposure is photosensitive layer facing up on an elek-4000 Volts, and the exposure will be about 2.7 with an Irish conductive clear glass electrode Luxsec instead of on the surface of the paper strengthens the layer with an activating solution the result is an image which activates the use of the as in example I and Π, and a 0.076 mm Plate as the ideal lithographic printing form enables 5 strong lithographic aluminum plates to be applied to the

activated layer applied. A second aluminum

Example XIV plate is placed on the first aluminum plate and

serves as the second electrode of the arrangement. One

The procedure from Example ΧΠ is repeated. Voltage of about 4000 volts is applied via a Wimit the difference is that the aluminum image sensor of 51 megohms is switched on and it takes place capture material on an aluminum roll of 10 cm with an exposure with a photo. about Diameter is drawn up and this arrangement 5.4 Luxsec. About 3 seconds after exposure The aluminum image receiving film with its Voltage of 4000 volts and exposure with an electrode manually subtracted while the chip image is rolled at about 3.6 Luxsec. The voltage obtained remains on the surface of the Aluminum printing form is made from the aluminum roll of image receiving material, resulting in a viscous one removed and BDd in a lithographic printing process, and the plate thus obtained is used as a lithograph. fish printing form used.

Example XV

»° Example XVI

A photosensitive mixture is prepared according to Examples I and II and as The procedure from Example XV is repeated, Coating on the surface of said film with, however, instead of aluminum image receiving one Spreading stick applied. The coating is made of a lithographic plate made of paper Room temperature for about 5 minutes. The paper printing form obtained is in dries. The obtained support is used by a lithographic method.

1 sheet of drawings

Claims (7)

a number of methods are known. For example, patent claims: Such a printing form can be produced by electrostatic imaging processes, with litho- 1. Electrophotographic process in which the graphic printing form is used in a conventional manner and an electrophotographic recording 5 wound electrophotographic copies are used. In the case of material with an image-receiving material under such a process, the toner used for developing the application of an electric field imagewise to the charge image is naturally exposed, the image-wise adhesion being hydrophobic, whereby the copy with a lithographic resistance of the photosensitive layer on the fish Printing ink can be wetted. After the layer substrate changes and by subsequent generation of the toner image on the surface of the separation of the image receiving material from the reflective layer, this is applied to a litho drawing material, aiif the. ;; Layer carrier., And graphic plate, for example on an aluminum plate completely machined to one another in accordance with the image receiving material. Then, mental images of the light-sensitive layer, the image will adhere to this base through the action of heat, thereby being marked, fixed, whereby the final printing form will be erased either with an image (32). Another electrostatic process for the hydrophilic image receiving material (26) to produce a lithographic printing form itself or a hydrophilic image on another is that a photoconductive material is seen as a coating of the receiving material (41) transferred image (31, 32), which is seen at relative low temperatures is used as a lithographic printing form. 20 evaporates, for example anthracene or sulfur 2. The method according to claim 1, characterized on the surface of a metal foil that is specially designed for indicates that the exposure is suitable for the lithographic purpose. On the photoconductive base (21) takes place through and that a charge image is generated as a capable coating and Image receiving material developed a hydrophilic lithographic. The toner powder is inherently hydroic Plate made of paper is used. 25 phobic and also has a relatively low melting 3. The method according to claim 1, characterized in that point. The metal foil is identified at a temperature that at least one of the complexes that causes evaporation of the photoconductive layer mental images (31, 32) on the surface of the in the non-image areas causes, so that the hydro wider hydrophilic image receiving material (53) phobic toner image remains on the plate. the transmitted by external light (61) heating continues until the image is developed will. is fixed on the plate surface and thus the 4. The method according to claim 1, thereby constituting the final lithographic printing form. A indicates that at least one of the complete third electrostatic processes consists of entmenting Images (31, 32) on the surface of the winding of a charge image on a usual further hydrophilic film receiving material (41) 35 electrophotographic recording material with hyduich external pressure (42) transferred drophobic toner, which has the same properties as will. the recording material itself has. To the copy 5. The method according to claim 1, characterized in that it can be used as a lithographic printing form, indicates that at least one of the complements between the developed image and the mental images (31, 32) produce different properties on the surface of the background, further hydrophilic binding material by making the plate surface with a hydrophilic exterior Heat is transferred. priority resolution is dealt with. This will make the picture 6. The method according to any one of claims 3 background hydrophilic. to 5, characterized in that as a further while these and other processes are fundamentally hydrophilic Image receiving material (41, 53) a 45 borrowed for lithographic purposes are applicable, occur lithographic plate made of paper is used. however, each has its disadvantages. The electrostatic 7. The method according to any one of claims 1 see method, there is a disadvantage, for example to 6, characterized in that for image 'larin that secondary solutions for generating the generation of an activation solution based on the different properties of the light required sensitive layer (22) is applied. 50 image areas are necessary. For procedures that start with a Removal of the non-image hydrophobic surface by evaporation of the photoconductive surface Working shift is an unfavorable process flow because the photoconductive The invention distills an electrophotographic layer with harmful vapors as they evaporate cal process in which an electrofractophotograph is generated. Furthermore, such a method is thereby Fish recording material with a picture sensitivity that limits the selection of photoconductive substances Catch material under the action of an electrical to those with relatively low boiling points and Field is exposed imagewise, with image melting points is limited. The main disadvantage the adhesive strength of the photosensitive 60 in a process in which the lithographic Layer on the substrate changes and by pressure forming by transferring an oleophilic finally separating the image receiving material toner image c directly onto a lithographic plate Recording material are placed on the substrate, is that during the To- and the image-receiving material, which are mutually complementary-transfer scripts, degrade the image sharpness Images of the photosensitive layer are adhered. remain, as it was with DT-PS 15 22 744 already before- The object of the invention is to provide a method was beaten. for the production of lithographic printing plates For the production of lithographic printing forms, it is necessary to create an uncomplicated and simple