DE1547696B1 - Image receiving material containing silver precipitation nuclei for the silver salt diffusion process - Google Patents

Description

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The invention relates to a silver precipitation nuclei, the one on which the silver precipitation nuclei are based holding image-receiving material for the silver salt metal of the metal used for the treatment of the diffusion process with noble metal compound used from metal sulfides, -poly- germs different sulfides, selenides or polyselenides, heavy metals.

Heavy metal salts or complex compounds of 5 As soluble gold, palladium and platinum salts Heavy metal sulfides with thioacetamide, dithiooxamide come in particular the alkali salts of halogen or Dithiobiuret or mixtures of the mentioned hydroacids of gold, palladium and platinum Substances of existing silver precipitation nuclei. in question, e.g. B. potassium chloroplatinite and potassium

It is known e.g. B. from the USA patents chloropalladit, but also z. B. gold trichloride. 2,352,014, 2,698,237 and British patent io Die by a pretreatment according to the invention 868 243, the beneficial effects that can be achieved with the silver salt diffusion process are therefore overexposed Silver halide emulsion layer in attendance, surprisingly because it was not previously possible, if not so a solvent for silver halide to avoid common precipitation nuclei photographic wrap and press against an image receiving sheet to get images in really neutral tones. Will which contains silver precipitation nuclei. It diffuses 15 z. B. when using Carey Lea silver precipitators formed soluble silver halide complex of nucleated image receiving sheets a triden Undeveloped areas of silver halide azole are used as a tinting agent, this becomes the emulsion layer to the germs on which the image is only imperfectly tinted. On the other hand, education A positive image of metallic silver over possesses a corresponding image to a large extent is precipitated. The silver precipitation nuclei can be 20 neutral tone, if the Carey Lea silver precipitation nuclei the specified substances are used. before using them with any of the specified

Disadvantageously treated with many of the known silver precipitation noble metal compounds. The under germs is that they are just before the production of the image using an image receiving material after the Receipt sheets must be generated, as their invention have generated images moreover higher Resistance is very low. Namely, a 25 maximum densities, an improved sound reproduction Dispersion of the germs left to stand longer, so the original and a considerably improved hold is lost them in density. The loss of density is based on availability.

probably on a fading effect. A receiving material according to the invention can

On the well-known Carey Lea silver precipitation germs, which are produced in that a suspension for example from the Kolloidzeitschrift, Vol. 8 (1911), 30 with one of the noble metal compounds described P. 240, are known, is disadvantageous that they contain a treated germ in a colloidal binder, have a yellow hue, especially then, such as. B. gelatin, on a suitable support, when dispersed in a colloidal medium e.g. B. baryta paper or made of glass, metal, z. B. are. Furthermore, it is difficult to germinate on Carey-Lea aluminum or synthetic polymers, ins-silver containing image receiving sheets, especially on transparent cellulose supports To tone images neutrally. estern, ζ. B. cellulose acetate, polyolefins, ζ. Β. Poly-

A disadvantage of the known, after the silver salt ethylene, polystyrene, polyesters, z. B. Polyethylene diffusion process produced images is also, terephthalate or polyamides, is applied, that they are often not very durable. It therefore has The type of support is not critical, There has been no lack of attempts that can be made after the image has been transferred over the coated substrate If necessary, a practically unhardened silver and various chemicals can be applied by means of an after-treatment halide emulsion layer. To method to remove or the image-receiving layer of exposure is then the emulsion layer with to be modified by a special treatment, a developer solution containing a developer compound, that the images achieve a greater durability. There 45 z. B. hydroquinone, and also a silver halo however, the durability of the images has been shown to contain solvents such as sodium thiosulphate, developed from the stability of the silver precipitation nuclei themselves. The undeveloped, on which thiosulfate depends, without any success so far, the stability of complexly dissolved silver halide diffuses in the process the germs improve noticeably. to the sub-layer containing the germs, where a

The object of the invention is therefore to find a silver precipitation 5 ° with respect to the negative in the silver halide nuclei containing image receiving material for the emulsion layer formed image positive image is formed, Silver salt diffusion process indicate the stable followed by the uncured silver halide emulsion silver precipitation nuclei Contains the non-fading layer removed by washing with warm water and images of excellent quality and ins- can be.

especially a great insensitivity to 55 The pretreatment of the silver precipitation nuclei takes place supply high temperature and high humidity. in such a way that first of all the germs in known The subject matter of the invention is based on a way by reacting two salts in one die Image receiving material containing silver precipitation nuclei enables the desired nuclei to be precipitated for the silver salt diffusion process using a metal medium.

sulfides, polysulfides, selenides or polyselenides, 60 The germs are expediently in one Heavy metals, heavy metal salts or complex- suitable suspending medium prepared, whereupon compounds of heavy metal sulfides with thio- the suspension obtained with the noble metal compound acetamide, dithiooxamide or dithiobiuret or is implemented. For the preparation of the germ suspension Mixtures of the substances mentioned are particularly suitable for silver suspension media precipitation nuclei and is characterized by 65 Verdaß for the production of silver halide emulsions it contains silver precipitation nuclei that are mixed with a turned colloid such as gelatin, casein, zein and the like. soluble gold, palladium or platinum salt of a. Mention may also be made of albumin, collodion and hydrolyzed hydrohalic acid have been pretreated, called callulose acetates, polyvinyl alcohols, polyacrylates

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etc. If a hydrophobic medium is desired, refer to Die in connection with a receiver sheet Polymeric binders can also be used, namely silver halide emulsions which can be used in accordance with the invention preferably in latex form, such as. B. styrene-butadiene are not critical. The usually mixed polymers, be used. Optionally reversible photographic emulsions from e.g. B. Mixtures of such a latex 5 silver chloride, silver bromide, silver iodide, silver chloride and a hydrophilic colloid can be used. bromide, silver chloride iodide or silver chloride bromide

The noble metal is expediently used in a gram iodide. The emulsions can

equivalent ratio to the germs of about 1: 3 if necessary with chemical or optical sensitivity

up to 2: 1, preferably 1: 1, used. After sensitized to the sizing agents and with other usual

Treatment of the germ suspension can graze it with additives.

in a known manner on a suitable carrier. The amount applied to a carrier

be worn. For example, nickel sulfide nuclei can be very different. Appropriate

from solutions of nickel nitrate and sodium sulfide, about 0.025 to 20 mg of germs are used per

manufactured and in a suitable medium, such as 0.09 square meters of support area.

z. B. gelatin, suspended or dispersed. The invention achieves that the noble metal compounds specified for the silver precipitation nuclei are then treated with one of the silver salt diffusion processes an image receiving material. For example, the stable silver precipitation nuclei can contain the nickel sulphide nuclei with potassium, which do not bleach, and chloroplatinite, which supplies platinum ions, provides treated of excellent quality, which are in particular very good, z. B. in a gram equivalent- «o are insensitive to temperature and moisture,
ratio of about 1: 1 to the nickel sulfide. According to an advantageous embodiment of the treated nickel sulfide nuclei have a modified invention, the image receiving material contains nuclei, appearance, ie the nucleus suspension is brownish that colored with a gold, palladium or platinum salt. This lowest positive valence of the metal pre-nickel sulfide suspension, treated with potassium chloroplatinit, is, in contrast to a 25 treated and made of Carey Lea silver, cadmium-untreated suspension of black nickel sulfide, cobalt sulfide, copper sulfide, lead sulfide, nickel sulfide nuclei, but much more stable, since the latter is already consist of sulfide, silver sulfide and / or zinc sulfide,
are heavily bleached after standing for 40 hours and such an image receiving material has turned colorless after 2 weeks. proven to be particularly stable.

The nuclei advantageously have average particle sizes from about 7 to 2500 Angstrom receiving material according to the invention contains e.g. B. units. Heavy metal 1.35 milliequivalents on a support surface of around 0.09 square meters are particularly suitable sulfides, such as B. nickel, lead, silver, zinc, antimony, nickel sulfide nuclei with 1.27 milliequivalents Cadmium or bismuth sulrides, namely either potassium chloropalladite, and 2000 mg alone or in mixtures or in the form of gelatin.

complex salts with thioacetamide, dithiooxamide According to a further advantageous embodiment or dithiobiuret etc. The heavy metal can but the invention contains the image receiving material also z. B. made of silver, gold, platinum, palladium or germs that are made from mercury with an alkali chloropalladite exist. Suitable heavy metal salts are nickel sulfide, with an alkali chloroind z. B. the tin (II) halides. 4 ° palladit treated cobalt sulfide, with a das

Carey Lea silver, which has been prepared from the negotiated zinc sulfide described in the colloid anion (PdCL ₄ ) ² ″ containing compound bezeitschrift, Vol. 8, (1911) p. 240, or from with an alkali process a characteristic Carey Lea silver treated with chloroplatinite or from see yellow color.

so it will be useful in a solution of such image receiving materials are not only

Colloids such as B. an aqueous gelatin solution, particularly stable, but also deliver particularly

suspended, whereupon the suspension with the noble stable images.

metal compound, such as B. a potassium chloro- When using the image receiving material after palladite solution, is treated. According to this handling of the invention in the silver salt diffusion process Carey Lea silver, which is usually yellow, can complete the usual developer compounds free of any yellow color. By being expended. They consist e.g. B. from hydroquinone carry the suspension on a carrier and on as well as other dioxyaryl compounds, including a receiver sheet is then left to dry. of corresponding naphthalene derivatives, para

This sheet can then contain a developing 55 phenylenediamine compounds and pyrazolidones.
exposed silver halide emulsion layer in The following examples are intended to further illustrate the invention in the nature of a silver halide complexing agent. . -I ₁
Be brought into contact, on the receiving example 1
leaves a positive image. The image obtained. A susist treated with potassium chloropalladite of any yellow tint over the entire density of nickel sulfide nuclei was free of scale as follows, whereas a receiving sheet with un- produced:

treated Carey Lea silver provides an image that is 300 ml of a 2% gelatin solution containing

the characteristic yellow background containing Carey 0.006 normal nickel sulfide, 60 ml

Lea silver germs owns. Incidentally, with a 0.017 normal K ₂ PdCl ₄ solution in 2.1%

Use of gelatin treated according to the invention was added. (All percentages mean

Carey Lea Silver lower germ concentrations unless otherwise noted, percentages by weight.)

applies than when using untreated This nickel sulfide suspension was after it

Carey Lea silver to maintain the same image density. for more than 15 months in a refrigerator

had been preserved, not bleached, while a corresponding suspension of nickel nuclei, which had not been treated with the palladium compound was already considerable after a week was bleached.

Example 2

1,2,4-triazole, with distilled water to 1.21 total volume diluted, immersed, whereupon they are squeezed by the superficially adhering liquid and on an exposed photographic film with a highly sensitive silver bromide iodide emulsion layer was pressed. The sandwich formed from the film and the seed-containing tape then became left in the dark for 20 minutes at room temperature, whereupon the tape

A ribbon-shaped polyethylene terephthalate carrier
was coated with a nickel sulfide suspension in such a way that negative film wound ^{on a carrier surface of 0.09 m 2 was separated.} In the volume 1.35 milliequivalents of nickel sulfide, which was produced with 1.27 milliequivalents at the same time, a neutral tinted positive equivalent potassium chloropalladite was treated
and 2000 mg gelatine were omitted.

The nickel sulfide seeds were prepared as follows:

7.5 ml of a 10% gelatin solution and 1.95 ml of a 1.00 normal sodium sulfide solution were added to 40 ° C added to 231.1 ml of distilled water. to this solution was 1.95 ml of a 1.00 normal nickel (II) nitrate solution that had previously been distilled with 50.0 ml Water was diluted, added with thorough stirring, whereupon 7.5 ml of 6% gelatin was added to the nickel sulfide suspension added and then 300 ml of the suspension with 300 ml of a 0.0062 normal potassium chloropalladite solution were united.

The coating composition was prepared by mixing g 20 in 160 ml of distilled water dissolved gelatin, while the gelatin solution was kept at a temperature of 4O ⁰ C, 8.3 ml of the above nickel

Image of good density.

Example 3 Further metal sulfide silver precipitation nuclei were used with

Potassium chloropalladinite treated as follows:

Solutions were prepared from 75.0 ml of 0.4% gelatin with 0.0065 normal sulfide nuclei, which were diluted with a 0.0062 normal K ₂ PdCl ₄ solution in a ratio of 1: 1 and 3: 1. For comparison purposes, untreated germ suspensions were also prepared. The metal sulfides used were: copper sulfide, zinc sulfide, cobalt sulfide, nickel sulfide, lead sulfide and silver sulfide.

The resulting suspensions were stored at a temperature of about 54 ° C. for 2 weeks. It was found that those solutions that had not been treated _{with K 2} PdCl _{4 with}

Suhidsuspension was added and the mixture, with the exception of the silver sulfide, all strongly distilled water were bleached to a final volume of 200.0 ml, while that with the palladium salt was added, with sulfide nuclei previously treated with a hardener, a significantly cheaper and a coating aid being added. Showed behavior. There were no changes whatsoever. This coating compound was then applied to the position of a development tape on a poly, copper and ethylene terephthalate film diluted _{with K 2 PdCl 4} in a ratio of 1: 1, neither in density nor in color. The coated 35 zinc, cobalt and nickel sulfide nuclei were found.

Foil was then for 3 minutes in a 32 ° C warm solution, consisting of 160 ml of a methylaminoethanol-S0 ₂ addition product with 19 percent by weight SO ₂ , 15.0 g of hydroquinone, 40.0 g of sodium thiosulfate, pentahydrate, 0.4 g Potassium iodide, 2.0 g 2-methyl-l-phenyl-3-pyrazolidone, 0.05 g 3-mercapto

40

The lead sulfide nuclei were very slightly bleached. In contrast, a lead sulfide nucleus suspension diluted in a ratio of 3: 1 with the K _{2 PdCl 4 was} still unchanged after 2 weeks. The test results obtained in detail are summarized in the following table.

Tabel

fresh Time of observation after 15 hours after 4 days turned green, heavily faded no change after 2 weeks Untreated germs slightly faded no change Red-brown became clear no change Bleach, heavily faded CuS blue precipitation White, no change silvery white no change milky ZnS opalescent slightly faded heavily faded no change black no change white precipitate no change heavily faded CoS black no change no change heavily faded NiS Red-brown Treated in a 3: 1 ratio black precipitate PbS Brown black no change no change Ag ₂ S no change Brown no change black precipitate CuS Brown black precipitate ZnS Brown no change heavily faded CoS no change Brown white precipitation *) no change NiS Brown no change PbS Brown no change Ag ₂ S

(Continuation of the table above)

fresh Time of observation no change after 2 weeks j after 15 hours | after 4 days no change Brown Treated in a 1: 1 ratio slightly faded no change CuS Brown no change no change no change ZnS Brown no change white precipitate no change CoS Brown no change no change no change NiS Brown no change slightly faded PbS Brown no change no change Ag ₂ S white precipitate *)

*) This precipitate probably consists of AgCl.

After storing the suspensions for two weeks in the case of the suspension treated with the palladium salt Development ribbons produced at 54 ° C. were detectable, while the untreated suspension the same effectiveness as fresh germs, as ao completely clear after 4 days (at 54 ° C) was determined by sensitometric measurements. had become.

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Example 4

Samples of unwashed positive images obtained by using physical development of receiving sheets with untreated nickel sulfide seeds and palladium-treated nickel sulfide seeds were prepared at 90% relative humidity and a temperature of about 32 ° C Stored for 4 days. The images of the carrier material with the untreated germs had after this Experience a considerable loss of density (1.0) over time, while the positive sensitivity increases was. In contrast, the images of the carrier file had the palladium-treated nickel sulfide nuclei suffered a density loss of only 0.22. The sensitivity had only increased slightly. Even the latter images showed no or hardly any visible yellow spots, while the images of the comparison material had a strong yellow background.

Example 5

Metal sulfide seed suspensions were also prepared as follows:

There were 2.0% gelatin and 0.4% gelatin solutions containing 0.006 normal nickel sulfide nuclei. The solutions then became the same Volumes of 0.0048 normal potassium chloroplatinite or 0.0088 normal gold trichloride solutions added.

These treated nickel sulfide seed suspensions were found to be about after three days of heating 54 ° C as excellent resistance to fading, while untreated nickel sulfide suspensions were already considerably faded after less than 1 day.

Example 6

There were nickel sulfide seed polyvinyl alcohol suspensions containing palladium prepared by adding the same volume of 0.0062 normal nickel sulfide to a solution of 0.0065 normal nickel sulfide in 0.4% polyvinyl alcohol Potassium chloropalladite solution was added, whereupon the diluted with the palladium solution Nickel sulfide suspension was heated to a temperature of about 54 ° C for 13 days. Even after this long time there was no noticeable change in density

Example 7

On a cellulose acetate, a suspension of 3.4 milliequivalents treated with a PaÜadiumsalz nickel sulphide nuclei 100 hardened gelatin was added per 0.09 m ^a support surface mg applied, whereafter this layer per 0.09 m ² support surface even 400 mg of an uncured, slow-working silver bromoiodide were applied. A coating aid was also used to produce both layers.

The exposed material was then immersed for 2 minutes in a developer solution for a diffusion transfer process, to which a clay modifier was added, immersed, followed by the uncured The emulsion layer was then washed off with warm water. It was a positive, neutral Obtained toned image of good density.

Example 8

There was provided a developing belt by on a cellulose acetate with the concomitant use of a hardness and a coating aid to about 0.09 m ² support surface, a suspension of 2.4 mg of 1.9 mg of K ₂ PdCl ₄ treated Carey Lea silver in 100 mg gelatin was applied.

The tape was then exposed at room temperature together with a highly sensitive Silver bromide iodide negative material in a developer solution of the following composition for 10 seconds immersed:

Methylaminoethanol-sulfur dioxide addition product with 10 percent by weight SO ₂ 130.0 g

Hydroquinone 20.0 g

Sodium thiosulfate, crystallized 20.0 g

Potassium bromide 10.0 g

1-phenyl-3-pyrazolidone 2.0 g

3-mercapto-1,2,4-triazole 0.3 g

3,8-dithiadecane-l, 10-bis (N-methyl-

piperidinium p-toluenesulfonate) 1.0 g

Isopropanol 100.0 g

made up to 11 with water.

The tape and negative material were then sandwiched at room temperature for 3 minutes educated. The image formed in the tape was about the

909 581/98

9 10

The development properties of the tape have become free of any yellow

Discoloration. Was a tape used that was only tested as described in Example 9. There were Carey Lea silver seeds alone; d. H. did not get practically the same results with that. Palladium salt contained modified germs, so were. · Τ -11

the denser areas of the picture because of the 5 Jieispie

Presence of the mercaptotriazole somewhat tinted, Another tape-shaped receiving material, being

however, the image had the characteristic yellow background, which was always observed when standing on a polyethylene terephthalate carrier using normal Carey Lea silver per 0.99 m ² carrier area 0.5 mg with 0.60 mg germs. Gold trichloride treated Carey Lea silver

ίο prepared by first adding 5.0 ml Carey Lea silver

Example 9 solution with 25.0 mg silver per millimeter, 100.0 ml

distilled water, 15.0 ml of 1% gold trichloride

Another development tape was prepared in solution and 100.0 ml of 5% strength ^e gelatin solution (at 40 ° C) by mixing at a Polyäthylenterephthalatträger on in the order given, mg a support surface of about 0.09 sq 0.5 Carey-Lea - 15 whereupon from 8.62 ml of the mixture, as described in Example 9 silver, which had been _{treated with 0.40 g of K 2} PdCl ₄ , 2000 mg of gelatin were applied by adding further gelatin. and water the actual coating solution

For the treatment of the Carey Lea silver with which it was manufactured.

Palladium salt were 5.0 ml at room temperature. The tape was finally again, as in Example 9

Carey Lea silver solution with approximately 25.0 mg of silver per 20 described, tested, giving approximately the same VerMilliliter solution, 100.0 ml of distilled water, 10.0 ml of search results. l ° / _o aqueous Kaliumchloropalladitlösung as well as well-known that the sensitometric properties

100.0 ml 5% ig ^e gelatin solution at 4O ⁰ C (in a transactions of the image molding physically developed solutions), while the mixed was used to coat, on the type of seeds used. 25 Surprisingly, the sensitometric mixtures of 8.62 ml of this silver seed suspension with shafts of the images, which were prepared using a 20.0 g of photographic gelatin in 171.38 ml of distilled receiving material according to the invention, are water so that the total volume became 200.0 ml versus images obtained using. known receiving materials have been produced,

This solution was finally not changed for a hardening of 3 °. This applies in particular to the gradient medium and a coating aid added. Dmax and the low exposure sensitivity. The finished, dried tape was then marked with a “. -119

Developer solution of the following composition ge 1 s ρ 1 e

soaks: As described in Example 2, nickel

Methylaminoethanol-sulfur ^{dioxide- 35} sulfide germs with and without prior treatment with

Addition product made with 19% by weight of potassium chloropalladite

Percent SO 100 0 ε comparison material, which contains palladium sulfide nuclei

Hvdroquinone ² 5Ό s. , Prepared in such a way that to one in 231 ml

Sodium thiosulfate 5HO "" "4θΌ e distilled water 7.5 ml of 10% gelatin and 1.5 ml

2-meth _y ll- _P henyi-3-pyrazoiidon '.'. '.'. '.'. ', 2, Ό g ⁴ ° l.OOnormale sodium sulphide solution containing Mi-3-mercapto-l, 2,4-triazole 0.3 g mixture at 40 C with vigorous stirring a solution

^ -Dithiodecane-UO-bis-tN-methyl- ^{from 1} ^ ⁵ ^ ¹ ' ⁰ , ⁰ ? ⁰ ™ ^? Kahumchloropalladit, the

piperidinium-p-toluenesulfonate) 1.0 g ^{had previously been} diluted with 50 ml of distilled water,

made up to the liter with water, which was then added, finally to the mixture

45 7.5 ml of 6% gelatin solution were added again

whereupon it was with a highly sensitive silver bromide.

iodine negative for 20 minutes at room temperature in accordance with the procedure described in Example 2

Contact was made. The negative was after this were then made using the three different ones

Time completely fixed, while suspensions on polyethylene terephthalate carriers in on the tape

neutral positive image was obtained. 50 the same concentrations as in example 2

_π . . described, coatings produced and that

Example 10 obtained material for the development of a high

A tape-shaped image receiving material of sensitive negative film was used, with a support made of polyethylene terephthalate. The image produced using the material with the made 0.5 mg of 55 'palladium ^{sulfide nuclei per 0.09 m 2 of support area showed a be-0.80} mg of potassium chloroplatinite-treated Carey-Lea- contained significantly lower sensitivity in the toe silver. First, a silver seed suspension area of the blackening curve, ie the log £ curve, was prepared by having 5.0 ml Carey at room temperature in this part an elongated "tail", Lea silver solution with about 25.0 mg silver per during the contrast and the D ^ z values were small milliliters, 90.0 ml distilled water, 20.0 ml l% ⁶⁰ or were considerably smaller than for the aqueous potassium chloroplatinite solution and 100.0 ml corresponding values for the other two 5 ° / _o gelatin solution were mixed (at 40 ° C) in the stated materials with untreated nickel sulphide nuclei order, after which the actual and with the palladium compound-treated nickel-coating solution in the same manner as in the sulfide germinate. Otherwise, the treated example 9 was prepared, with the exception that 65 and untreated nickel sulfide nuclei containing 65 and untreated nickel sulfide nuclei, however, that a Carey Lea silver nuclei suspension treated with 8.62 ml of Pt ++ ion carriers using sensitometric properties using treated, within narrow limits, was almost identical. From this it emerged. that it is in the silver precipitation germs of the

Invention does not simply involve transferring germs of one type into germs of another type Silver precipitation germs can act. In the special case this means that the nickel sulfide nuclei not simply in palladium sulfide nuclei by the treatment with the palladium compound be transferred because the sensitometric properties of the nickel sulfide nuclei in the new nuclei have been preserved and the new seeds have the more favorable stability properties of the palladium sulfide seeds have gained.

Claims (3)

Patent claims: 1. Image receiving material containing silver precipitation nuclei for the silver salt diffusion process with metal sulfides, metal polysulfides, metal selenides or metal polyselenides, heavy metals, heavy metal salts or complex compounds of heavy metal sulfides with thioacetamide, dithiooxamide or dithiobiuret or mixtures of the substances mentioned, existing silver precipitation nuclei, thereby marked that there is silver Contains precipitation nuclei with a soluble gold, palladium or platinum salt of a hydrohalic acid have been pretreated, the metal on which the silver precipitation nuclei are based differing from the metal used for the treatment the noble metal compound used is different. 2. Image receiving material according to claim 1, characterized in that the germs with a Gold, palladium or platinum salt with the lowest positive valence of the metal pretreated and are made of Carey Lea silver, cadmium sulfide, cobalt sulfide, copper sulfide, lead sulfide, nickel sulfide, Silver sulfide and / or zinc sulfide exist. 3. Image receiving material according to claim 1, characterized in that the nuclei are made of nickel sulfide treated with an alkali chloropalladite, cobalt sulfide treated with an alkali chloropalladite, zinc sulfide treated with a compound containing _{the anion (PdCl 4} ) ^{2 or treated with an alkali chloroplatinite or Carey Lea silver} consist of Carey Lea silver treated with gold trichloride.