DE1547806A1 - Color diffusion transfer process - Google Patents

Description

Eastman Kodak Company., 3 ^ 3 State Street, Rochester, New York State, United States of America

Color diffusion transfer process

In the parbo diffusion transfer photographic process is known to be an exposed silver halide emulsion layer, which is in contact with a non-diffusing color coupler, with one of primary aromatic Amines existing color developer develops, the oxidation products of which are formed with the color coupler React diffusing dyes, whereupon the dyes are transferred by diffusion to a suitable receiving material.

In such parb diffusion transfer methods, the Usually a light-sensitive photographic material is used, which has three different spectrally sensitive images

9039Ö5 / 0585

Having silver halide emulsion belts. Any of these Emulsion layers are in contact with a non-diffusing color coupler, which is used during development with one consisting of a primary aromatic amine Color developer supplies a dye of the corresponding complementary color.

The coupler-containing silver halide emulsion layers exist from the silver halide emulsion negative layer, negative transfer images are obtained.

Photographic materials of the type described can also be used in the production of positive transfer images will. In this case a black and white development of the exposed areas of the Emulsion layer. The unexposed and undeveloped areas of the emulsion layer are then presented the color development in the usual way by a flash exposure or made developable by chemical obfuscation or by using certain black and white developers in cored silver halide emulsions which develop faster than color developers or through Use of certain development inhibitors releasing couplers to achieve the reverse effect.

3098Ö5 / Ö585

547806

Furthermore, there are also color diffusion transfer processes known, if there are many marriages, starting from direct positive silver halide emulsions, Direct negative transfer images in a single development step using a color developer let get. Such methods are for example in the USA patents 3,227,550, 3,227,551, and 3,243 29 ^.

The known Diffuslonsüberertrar; ung.s procedure in which by reaction of a photographic color coupler with an oxidized, from a »primary aromatic amine existing »color developer compound a diffusible Dye is formed, however, have the disadvantage that £ when the color image is transferred to a pickled receiving layer, lower! narrow of the Development of reaction by-products formed and lower Amounts of unused color developer compound; with ttb-be endured.

The simultaneous transfer of reaction necrotic products and / or unused developer compound on the receiving material is particularly undesirable because these Links after the transfer In the districts of the high

Lights or the D. easy to stain and vermin

lead to staining.

9098Ö5 / 0S8I

BATH ORIGINAL

Receiving materials, has become known with a pickling agent layer so / ie an underlying acidic layer, which serves to remove the The alkalinity of the image on the receiving layer. It is also known to arrange intermediate or control layers between the acidic layer and the image receiving layer, to control the effective delivery of the acidic matter. Such receiving materials are for example in US Pat. No. 2,584,030 and German Pat. No. 1,380,778.

The known receiving materials of the type described can be effectively used in a diffusion transfer process des In U.S. Patent 2,983,6O6 use described type, which is based on a black and white development, with a connection with a Hydroquinone developer residue and a dye residue is used, but when using such multilayer Capture materials in the pattern of color diffusion transfer processes, which use primary aromatic amines as color developers, stains cannot be prevented.

Accordingly, the object of the invention was to provide a dye diffusion transfer method in which a dye is obtained by reacting a coupler compound; with an oxidized primary aromatic amine color developer compound is generated - and in which the dye formed is transferred to an EEiP -fancsnaterlal- develop an IirnpfangBiaaterialau, \, <ii which the secondary of the previously used "

BATH ORIGINAL

known receiving materials are avoided and after the transfer of color images with reduced flaking, high contrast, high sharpness and areas of clear, high light can be obtained.

The invention relates to a color diffusion transfer process, in which an: imagewise exposed photographic material is coated with at least one silver halide emulsion, with its silver halide a non-diffusing, with an oxidized primary aromatic amine color developing agent is in contact with a diffusing dye-forming color coupler, in the presence of an aromatic primary amine color developing agent is treated with an alkaline solution and in which the resulting diffusible dye image is transferred to a receiving material, thereby characterized in that the dye image is on a receiving material transmits, which consists of a carrier and

1. an alkali-permeable layer with a pickling agent for the dye image (mordant layer),

2. an alkali-permeable layer with a non-diffusing, acidic substance, which between carrier and Pickling agent layer (acid layer),

9098SSZOSSS
BAD ORIGINAL '

3. an alkali-permeable, light-reflecting layer with a non-diffusing, finely divided white Pigment between the acid and the mordant layer (pigment see),

and, if necessary, further intermediate or top layers.

The receiving material used in the process of the invention can either consist of a separate sheet material or with the photographic material form a unit, in which case the layers of the Receiving material between the light-sensitive layer or layers of the photographic material and the support are arranged.

The white pigment present in the intermediate pigment layer not only serves to hide the stains or discoloration formed in the underlying acid layer, it also restricts the formation of stains to the acid layer underneath. This is why Surprising, because it was to be expected that between the white pigment and the unconsumed, alkaline pigment Developer compound as well as the development reaction products some affinity would exist and a not insignificant amount of it would be adsorbed by the intermediate pigment layer would be.

90988S / 058S

BATH ORIGINAL

As will be shown later, they occur in used Receivers without pigment in both the intermediate layer and the underlying acid layer Stains or discoloration while the receiving material used in the process of the invention exhibits the pigmented intermediate layer does not stain or discolor demonstrate.

Obviously, the staining substances are from repelled the white pigment, effectively freeing the white topcoat of development reaction products remain.

The pigmentary layer of the receptor material does not work only as a stain masking and attenuating layer, but also as a timing layer to reduce the Alkalinity of the process and as light reflective Layer.

The method of the invention thus enables manufacture of copies by the Tarb diffusion transfer method improved quality

In the context of the method according to the invention, the Yandersiict.stcti color photographic materials

BAD ORIGINAL, '

which contain at least one light-sensitive silver halide emulsion layer with whose, Silver halide is in contact with a photographic color coupler. This coupler can be used directly in the silver halide emulsion layer be present or in one of the silver halide emulsion layer adjacent Layer.

According to a particularly advantageous embodiment of the Invention, the photographic material consists of a multicolor material with superimposed red, green and blue-sensitive silver halide emulsion layers with a phenolic compound as a cyan coupler, a 5-pyrazolone compound as a purple coupler or an open-chain ketomethylene compound as a yellow coupler. The couplers should not diffuse themselves, but after reaction with oxidized, primary, aromatic ones Amine color developing agents such as p-phenylenediamines form diffusible dyes.

The treatment of the imagewise exposed photographic Materials with an alkaline treatment solution can be done by placing the material in this solution immersed by bringing it into contact with an image receiving material soaked in the treatment solution brings or by putting one between the photographic Material and the receiving material lying container, which the treatment contains solution, breaks »

909885/0585 BATH

The one consisting of a primary, aromatic amine Color developing agent can be in one layer of the photographic material or in the separate one Color image receiving material must be available. However, it is preferably located in the alkaline treatment solution.

Suitable for carrying out the method of the invention photographic materials and alkaline processing solutions are used e.g. B. in U.S. Patents 3,227 and 3,227,551. Furthermore, in the USA patent 3 243 294 to carry out the proceedings of the invention described materials which contain non-diffusing couplers, which after reaction with partial developer compounds consisting of oxidized, primary, aromatic amines provide diffusing dyes

The mordant of receiving material may contain any \ for pickling of dyes usual mordant. Suitable mordants are, for. B. aminoguanidine polymers or vinyl methyl ketone derivatives as described in U.S. Patent 2,882,156. Further suitable mordants are, for example, polymeric 2-vinylpyridine, metho-p-toluenesulphonate and similar compounds described in US Pat. No. 2,484,430, as well as cetyltrimethylammonium bromide. Particularly effective, a pickling agent

iÖ98SS / Ö5 »p
BAD ORKSlNAl /

containing coating compositions are disclosed in US patent applications with serial no. 214 095 and 211 094.

The US patent application serial no. 211 095

described, a mordant-containing coating compositions consist of at least one hydrophilic organic Colloid, which in finely divided form is a uniform dispersion of droplets or spheres of a high-boiling, do not mix with water, contains organic solvent in which a cationic, non-polymeric, acidic, organic dyes corrosive compound is dissolved.

The US patent application serial no. 211 094 described, a mordant-containing coating compositions consist of at least one hydrophilic organic Colloid, which in finely divided form is a dispersion of particles of an acidic organic compound with free acid groups and one cationic, no polymeric, organic dyes corrosive compound for acid dyes formed.n salt.

Suitable cationic or basic, organic dyestuff-pickling compounds are, for example, quaternary Ammonium and phosphonium salts as well as ternary sulfonium

909885/0585

BATH ORIGINAL '

5A 7806

compounds in each of which is optionally substituted on the Ii, P- or S-Oniumatora at least one hydrophobic ballast group, such as _v, long chain alkyl group attached.

The receiving material used in the method of the invention for the color images can either be separated from be arranged with the light-sensitive material or form a unit with it photosensitive material and the color receiving material from a unity, so is between the two Share a stripping layer to allow the photosensitive silver halide emulsion layers after transfer of the color image on the mordant layer is easily removed can weöen.

Such strippable layers can be made from hydrophilic Fabrics that are easily washed off or peeled off can consist, for example of water-soluble, hydrophilic, organic colloids or emulsions z. B, polyvinyl alcohol, esterified with phthalic acid Gelatin, alkali-soluble cellulose ether phthalates, methyl cellulose and the like. They are also suitable in U.S. Patent Specs 2,033'63 and 2,725,293 carboxylated cellulose compounds.

90988S / OSßS BAD ORiÖiNAL

The acid layer at the bottom contains either a non-diffusing or "immobile" monomeric · or polymeric compounds with acidic groups or groups which liberate an acid, and optionally. Ballast groups. The compound should be able to react with alkaline substances or polymeric bases. The layer can also contain compounds with substituents which "capture" basic reactants can (trapping)

Suitable monomeric compounds are, for example, acids, such as B. carboxylic acids having at least 16 carbon atoms, 'such as stearic and palmitic acid.

Polymeric, acidic compounds are preferably used. These include water-soluble, carboxyl-containing polymers, the sodium and / or potassium salts of which are water-soluble.

On the other hand, polymers can also be used which contain acid anhydride groups which are converted into free carboxyl groups during the transfer process. Suitable polymeric acids are, for example, Cellulosede.rl.vate and vinyl polymers as well as acids of other polymeric compounds.

90 98 85/0585

BATH ORIGINAL

, - ■. '■ ". ■■■. ■. ■ · ■ / ^: ■■, ■ ■■■. *«

Examples are: dibasic half-esters of cellulose derivatives with free carboxyl groups, such as cellulose acetate Hydrogen phthalate, cellulose acetate hydrogen glutarate, cellulose acetate hydrogen succinate, Ethyl cellulose hydrogen succinate, ethyl cellulose acetate hydrogen succinate, ethyl cellulose hydrogen phthalate, Ether and ester derivatives of cellulose, which with sulfo anhydrides, i.e. for example with o-sulfobenzoic anhydride modified polystyryl sulfonic acid. Carboxymethyl cellulose, polyvinyl hydrogen phthalate, Polyvinyl acetate hydrogen phthalate, polyacrylic acid, 'acetals' of polyvinyl alcohol and carboxy- or sulfo-substituted aldehydes, that is to say o-, m- or p-benzaldehyde sulfonic acid or carboxylic acid, partial esters of ethylene-maleic anhydride copolymers, partial esters of methylyiriyl ether-maleic-i acid anhydride polymers and the like. ■

The task of the acid layer is to end the development | and the stabilization of the copy obtained by reaction and lowering the pH of the alkaline developing solution used for developing the photosensitive, photographic Material is used from which the dyes after exposure and development on the receiving material diffuse *

The white pigmented intermediate layer, the receiving material is for developing photographic material

909885/0585

BATH ORIGINAL

used alkaline treatment solution permeable. To produce the pigmented intermediate layer of the receiving material, fine powdery white pigments such as Titanium dioxide, barium sulfate, calcium sulfate, colloidal silica and similar inert, inorganic, white pigments be used. Titanium dioxide is preferred.

The layer should contain so much white pigment that it becomes opaque and that in the acid layer underneath any stains or * discoloration that may appear. In addition, the pigment forms the reflective background for the image in the mordant layer.

The amount of pigment used is usually greater

of the undesirable

than the one usually used to reduce oaetXJQüücXiSeajeeXiCäögö infiltration of light at the edges of OttWA photographic material

amount of pigment used. Expediently, per dm of support area 10.76 to 215.28 mg pigment (0.1 to 2 g / sq.ft.), Preferably about 55.07 to about 139.93 mg pigment (0.5 up to 1.3 g / sq.ft.).

An alkali-permeable binder or an alkali-permeable carrier is used as the carrier or binder for the white pigment. Suitable binders are, for example, gelatin, polyvinyl alcohol, hydroxypropyl polyvinyl alcohol, poly (vinylme ¹ thy lather), polyethylene oxide, partial acetals from

90 9885/0585

BADORtGtNAL

Polyvinyl alcohol, such as partial polyvinyl butyral, Partly polyvinyl formal, part polyvinyl acetal, part polyvinyl propiorial and the same.

The ratio of white pigment to binder is not critical though the weight ratio of pigment too

The binder is expediently about 1: 5 to 5: 1, preferably about 1: 1 to 3: 1. The thickness of the white pigmented The intermediate layer is suitably about 3 to 25 microns, preferably about 8 to 15 microns.

The transferred by diffusion _v Color is pickled in the mordant layer of the receiver. The color image stands out well against the white background which is formed by the white pigmented intermediate layer of the receiving material. Staining or discolouring substances are bound and invisibly masked in the acid layer, which lies between the white pigmented intermediate layer and the carrier of the image receiving material.

In addition to its effect as a stain mask, the pigmented intermediate layer also serves as a control layer to control the diffusion rate of the individual constituents of the alkaline Developer solution in the underlying acid layer 'Control · Obviously, the white pigment facilitates this last-mentioned control function.

909885 / 058S

. - ■.

BADORJQfNAt

This gives enough time to completely cover the exposed photosensitive material develop, the dye completely from the light-sensitive material to the parb-receiving layer transferred and the dye image in the dye-receiving mordant layer of the receiving material in to train appropriately.

Except for the mordant layer, the white pigmented one Pigment and the acid layer can be the image receiving material possibly also, contain further layers »Examples of this are intermediate layers, top layers with UV absorbers and the like.

The different layers of the image receiving material as the photographic material can also be used in the usual Catfish applied to a wide variety of common carriers be. Suitable supports are, for example, paper, with Polyethylene coated paper, polypropylene coated paper, cellulose nitrate films, cellulose acetate films, Polyvinyl acetal fibers, polystyrene films, polycarbonate films, Polyethylene terephthalate and similar other films made from resinous materials.

The drawing is intended to illustrate the invention in more detail.

908385/0585

6AD

It is shown in detail in:

Fig. 1 ·.

a multicolor photographic material in conjunction with a separate image receiving material and a
breakable container containing an alkaline treatment solution.

Fig. 2

a light-sensitive material in which the light «, sensitive part and the image receiving material Form unity.

As can be seen from Flg. 1 results, a red-sensitive silver halide emulsion layer 11, which contains a non-diffusing coupler, is arranged on the support 10
which upon reaction with an oxidized primary aromatic amine color developing agent forms a diffusing cyan dye. On the red-sensitive silver halide emulsion layer 11 there is an intermediate layer 12 which separates the overlying green-sensitive silver halide emulsion layer 13 from the red-sensitive silver halide emulsion layer 11. The intermediate layer 12 can optionally contain additives such as antioxidants, non-diffusing couplers, which form non-diffusible dyes with the oxidized color developers from adjacent layers, filter dyes,

\ 909885/0585 I '

BATHROOM ORIGINAL H *.

such as a purple filter dye and the like. contain. The green sensitive silver halide emulsion layer 13 contains a non-diffusing coupler, which after reaction with an oxidized, primary, aromatic amine color developing agent provides a diffusing purple dye, over green sensitive Silver halide emulsion layer 13 is an intermediate layer 14 which is the green-sensitive Silver halide emulsion layer 13 from the blue-sensitive Silver halide emulsion layer 15 separates. The intermediate layer 14 can be similar to the intermediate layer Antioxidants, non-diffusing couplers, which interact with oxidized, primary, aromatic amine developer compounds Form non-diffusing dyes from adjacent layers, contain filter dyes and the like. Typically, the intermediate layer 14 contains yellow Carey Lea silver and serves as a blue light filter. The blue-sensitive emulsion layer 15 does not contain one diffusing coupler which, upon reaction with an oxidized color developing agent, produces a diffusing yellow dye supplies, over the blue sensitive Silver halide emulsion layer 15 is a top layer 16, which additives, such as antioxidants, UV absorbers, color developers and the like. Contain.

909885/0585

BATH ORIGINAL

The image receiving material consists of a carrier 21 with an acid layer 20 arranged on the carrier. The acid layer 20 is followed by a white pigment layer 19, which is separated from the subsequent pickling agent layer 17 by an intermediate layer 18.

In the breakable container 22 is an alkaline treatment solution, in which preferably also contains the primary, aromatic color developing agent

The receiving material lays over during the transfer the photographic light-sensitive material. Cyan dye that diffuses during color development from layer 11, the purple dye from layer 13, and the yellow dye from layer 15 image-wise one after the other on the pickling agent layer 17

After the diffusion transfer of the color images from the photographic material (in Fig. 1 through layers 10 to 16) on the mordant layer of the receiving material (represented in Fig. 1 by layers 17 to 21), the alkalinity of the developer solution is determined by the in the acidic substance present in the acid layer 20 of the receiving material is considerably reduced Image reception 3 materials from photosensitive, photographic. Material, the alkalinity of the remaining developer

BATH ORIGINAL

dissolution on the color image receiving material is further reduced, which avoids post-treatment of the material » can. Furthermore, staining substances are localized in the acid layer 20 of the receiving material and through the white pigment layer 19 masked or covered.

The material shown in Fig. 2 consists of a carrier 30, the acid layer 31 'of the white pigment layer 32, the mordant layer 33, the intermediate layer 3 ¹ * "of the stripping layer 35, which serves to separate the image receiving material from the photo-sensitive portion of the photo- to enable the photographic material after the transfer of the color image, and the layers ^36-1 Jl which 11 correspond to, layers shown in Fig. 1 to 16.

After imagewise exposure and moistening with an alkaline treatment solution containing a primary, aromatic amine color developing agent, the cyan, magenta and yellow dyes diffuse from layers 36, 38 and 40, image-wise, one after the other onto the mordant layer 33 the stripping layer is peeled off, and the layers 35 to kl are removed. What remains is the mordant layer 53 with the color image, the white pigmented layer 32, which covers the stain-forming materials, and the acid layer 31.

909885/0585

BAD ORIGtNAL

The following examples are intended to illustrate the invention in more detail. illustrative.

example 1

Three different image receiving materials 1, 2 and 3 were prepared, each in that described later Way used to transmit a multicolored image.

• *

Receiving material # 1

A layer of the following composition was applied to an opaque, white paper support:

Gelatin 55.07 mg / dm ² (500 mg / ft ² )

Octadecyltributyl- _{? 2}

amroonium bromide 21.53 mg / dnr (200 mg / ft)

applied.

Receiving material # 2

On an opaque white paper tiger, the following were made applied four layers, with layer 1 being the layer closest to the wearer.

909885/0585

15A7806

Layer 1

CopolyCmethylvinylether / Maleic acid) 322.92 mg / dm ² (3000 mg / ft ² )

Layer 2

Polyvinyl alcohol Polyvinyl acetate 72.12 mg / dm ² (67O mg / ft ² ) 127.01 mg / dm ² (II80 mg / ft ² )

Layer 3 gelatin

5.51 mg / dm ² (50 mg / ft ² )

Layer 4 gelatin

55.07 mg / dm ² (500 mg / ft ² )

? p

Octadecyltributylammonium bromide 21.53 mg / dm (200 mg / ft)

Receiving material no.

The image receiving material had a structure similar to that of No. 2 image receiving material. Layer 2 owned however, the following composition:

Polyvinyl alcohol polyvinyl acetate 48.44 mg / dm ² (450 mg / ft ² )
80.73 mg / dm ² (750 mg / ft ² )

Tormented

("Titanox TL", titanium dioxide,

Titanium Pigment Corp. NYC) 107.64 mg / dm ² (1000 mg / ft ² ) *

909885/0585

BATH ORIGINAL

A multicolor photographic material of the type described in Example 1, columns 30 and 31 of U.S. Patent 3,227,550 and illustrated by Figure 1 of the drawing (layers 10-16) was also prepared. The silver halide emulsions used were composed of direct positive gelatin silver bromoiodide emulsions with a 1-hydroxy-ij-O-octadecylcarbanylphenylthio) -N-ethyl-3 ', 5'-dicarboxy-2-naphthanilide coupler, a 1-phenyl-3- (3.5 -disulfobenzamido) - ⁱ l- (2-hydroxy-ilpentadecylphenylazo) -5-pyrazolone coupler and an α-pivalyl-α-iS-octadecylcarbamylphenylthioJ-JJ-sulfoacetanilide potassium salt coupler in the red-, green- and blue-sensitive emulsion layer.

Portions of the photographic material were separated, but exposed in the same way by a neutral density test chart and 3 minutes, developed at about 22.2 ⁰ C with an aqueous solution of the following composition was sprayed on the parts.

Benzyl alcohol 5 ml

6-nitrobenziraidazole 0.25 U

highly viscous hydroxyethyl cellulose 20 g

Sodium hydroxide 6 g

p-Aminoethyl-ß-hydroxyethylaniline 1.25 g

Make up to 1 liter with water

909885/0585

BADÖftlGtNAl /

This solution was sprayed between the exposed photographic materials and the image receiving sheets 1, 2 and 3, respectively. After the development was completed, the image receiving sheets were separated from the photographic light-sensitive materials. Image-receiving sheet No. 1 was divided into two parts, one of which was washed with water for 3 minutes at about 23 ° -9 ° C. and then dried. Both parts of the receiving sheet 1 as well as the receiving sheets No. 2 and 3 were then cut into three strips each, which were designated with a, b and c.

All strips were ^w a ⁿ 24 hours at a temperature of 6O ° C and stored at a relative humidity of 7Οί in an oven.

All strips ^M b ^w were stored in an oven for 1 week at a temperature of 60 ° C and a relative humidity of 70X.

All strips "e" were exposed to a xenon arc lamp for 48 hours.

The following table shows the increase in the number of spots which were found in each sample in the districts of the high regions

occurred. The measurement was carried out with a blue light at 450 ° I. . "*,

309805 / OStI u I i ^

BAD ORiGfNAi.

547806

original density by density - receiving material strips density of treatment change

1 unwashed a 0.57 ' 1.47 0.90 Il b 0.50 1.52 1.02 Il C. 0.63 1.70 I.07 WASHED a 0.36 0.42 0.06 I. If b 0.40 0.50 0.10 H C. 0.37 0.27 - 0.10 i
2 unwashed a 0.39 0.93 0.54 It b 0.56 1.18 0.62 Il C. 0.41 0.44 0.03 3 unwashed a 0.45 0.50 0.05 Il b 0.59 0.54 - 0.05 It C. 0.54 0.49 - 0.05

The table clearly shows the improvement that results can be achieved with a "pigmented" receiving material.

Has been the pigmented interlayer in the districts of the high lights of the strips "a", "b" and "c" of the receiving material 3 are omitted and this is then incubated

909885/0585 BAD ORlGfNAL

- 2 B -

547806

and exposed, it turned out that the lower
the polymeric acid-containing layer has a similar one
The same as the corresponding strips
the receiving layer no. 2.

Example 2

Using an opaque white paper as a support, image-receiving materials of the following composition were obtained
manufactured. (Layer 1 is the layer closest to the carrier.)

Receiving material I.

Layer 1 Layer 2

Layer 3 Layer 4

(600 mg / ft

Gelatin 64.57 mg / dm '

Copy (methy1viny1-

ether / maleic acid) 322.92 mg / dm ² (3000 mg / ft ² )

Polyvinyl acetate

Polyvinyl alcohol

Polyvinyl alcohol

Octadecyl-tri-n-

butylammonium

bromide

113.02 mg / dnr (1Q50 rng / ft ^) 56.51 mg / dm ² (525 mg / ft ² ) 55.07 mg / dm ² (500 mg / ft ² )

21.53 mg / dnr (200 mg / ft

Receiving material II

Same as receiving material I, with the exception that layer 3 had the following composition:

Polyvinyl acetate 113.02 mg / dm ² (1050 mg / ft ² ) Polyvinyl alcohol 169.53 mg / dm ² (1575 mg / ft ² )

909885p, BAD ORIGINAL

Ί547806

Receiving material III

Same as receiving material I, except that layer 3 had the following composition:

Polyvinyl acetate Polyvinyl alcohol TiO ₂ powder

58.12 mg / dm ² (5 ^ 0 mg / ft ² ) 29.06 mß / dm ² (270 mg / ft ² ) 80.73 mg / dm ² (750 mg / ft ² )

Receiving material IV

vsiie receiving material I ₁ with the exception that layer 3 had the following composition:

Polyvinyl acetate polyvinyl alcohol TiO2 powder

113.02 mg / dm ² (1050 mg / ft ² ) 56.51 mg / dm ² (525 mg / ft ² )

113.02 mg / dm ² (1050 mg / ft ² )

Receiving material V

Same as receiving material I, with the exception that layer 3 has the following composition:

Polyvinyl acetate polyvinyl alcohol -PuIver

16.15 mg / dm ² (150 mg / ft ² ) 40.36 rag / dm ² (375 mg / ft ² )

113.02 mg / dra ² (1050 mg / ft ² )

$ 03885/0585

BAD OFHQiNAL Receiving material VI

toie receiving material I, with the exception that layer 3 * had the following composition:

Polyvinyl alcohol

56.51 mg / dm ² (525 mg / ft ² )

Receiving material VII

Same as receiving material I, with the exception that layer 3 had the following composition:

Polyvinyl acetate polyvinyl alcohol

16.15 mg / dm ² (150 mg / ft ² ) 40.36 mg / dm ² (375 mg / ft ² )

All of the specified receive materials were as described in Example 1, tested, and indeed with the following results:

The density of the neutral Färbstof fbildes (ie, cyan, magenta and yellow dyes) in the districts of the maximum density was in the Empfangsiaater lallen% _t II, III, IV and V virtually the same, while the Farbdi ^ e in the receiving materials VI and VII was insufficiently low

From these results I can see that the Tltan4 $$ M # 4 ■ in layer 3 of the test materials II I, Hf is just as effective as a tax substance as is polyaäaa

BATH ORIQiNAi

such as, for example, polyvinyl alcohol and / or polyvinyl. acetate. While the relatively low amounts of polymers in the receiving materials VI and YII are not sufficient »to perform the required control function (timing function), However, they act as a binder for titanium dioxide, as can be seen from the behavior of the receiving material III results. The titanium dioxide can be present in the pigment interlayers of the color image receiving materials either in addition to or in lieu of a portion of the alkali permeable polymer Materials, as in Receiving Materials IV "and V to be available.

Example 3

Additional receivers of the type described in Example 2 as Receiver III were prepared; in which the only binder for the titanium dioxide consisted of polyvinyl alcohol. When these receivers were tested as described in Example 1, similar results were obtained as with receiving materials in which the titanium dioxide is dis-

was pergated. ,

BATH ORIGINAL Example 4

A strip of a multilayer material similar to the multilayer photosensitive material described in Example 1 was exposed through a step wedge with a neutral density increment of 0.3 using the method described in Example 1 and tested. Receiving material 3 described in Example 1 was used as the image receiving material. The sample was designated ^M a ".

The sample "a ^M" was then stored in an oven for 2k hours at a temperature of 60 ^° C. and a relative humidity of 70 $.

An undeveloped sample of receiving material 3 described in Example 1 was designated ⁿ b "and stored in an oven in the same manner.

When the two samples were visually examined, it was found that the area of the sample ^w a ", which corresponded to the maximum exposure on the photographic material, was as white as the total area of the sample" b *. This example shows that the white-pigmented intermediate layer of the receiving material used in the method of the invention no affinity for the fleekenbildenden substances which polymeric by development with the originate aromatic amine developer, has "I

80988SZOSiS

BATH ORIGINAL

547806

Example 5

It became an educational color photographic light-sensitive material made, which with an image receiving material formed a unit. The photographic material

in Fig. 2
corresponded to the / presented material. The light-sensitive portion of the material (layers ^36-1 Il) corresponded to the
of the material described in Example 1 with the exception that the silver halide emulsions of the individual layers
consisted of common negative developable emulsions. Immediately below the silver halide emulsion layers were the layers indicated below. the
Layer 1 was directly on the carrier.

mg / dm '

Layer 1 CopolyCmethylvinylether / maleic acid

Layer 2 polyvinyl alcohol

TiO ₂ powder * r layer 3 polyvinyl alcohol

Octaacyl-tri-n-butylammoniurabromide

Sghichfr

gelatin

Schiaht 5 gelatin anhydride / gelatin

Clerivat with 25% phthalic anhydride

Copoly (ethyl acrylate / acrylic acid, 8u 80ί esterified

mg / ff

322.92 (3000) 56.51 (525) 113.02 (1050) 55.07 (500) 21.53 (200) H, 31 (^ O) 10.76 (100) 10.76 (100)

909885/0585

BATH ORIGINAL

Various samples of this photographic material were exposed through a three color negative and treated in the following manner:

1. Development 30 seconds at a temperature of ¹ 51 "7 ⁰ C in a developer solution of the following composition:

Trisodium phosphate 75.0 g

Diethyl hydroxylamine sulfate 0.5 g

1-phenyl-3-pyrazolidone 0.2 g

Potassium bromide 8.0 g

p-Aminoethyl-ß-hydroxyethylaniline 10.0 g

Sodium hydroxide 2.0 g

2-aminoethanol 3.0 g

6-nitrobenzimidazole 0.18g

Make up to 1.0 liter with water

2. Immersion for 15 seconds in an acidic stop bath with 2% acetic acid at a temperature of 22.2 ° C »

3. Wash by spraying water at 22.2 ° C for 15 seconds.

4. Drying.

909885 / 0S85

BATH

- ³³ - Io47806

During the processing of the photographic material, those in the photosensitive portion of the diffused Image dyes formed from photographic material on the unit with the photosensitive portion forming mordant layer (layer 3), in which a three-colored Picture was created. During the washing, the photosensitive layers became detached from the receiving material severed. The stripping layer 5 was dissolved.

There were other receiving materials as described, produced, with the exception, however, that under the mordant layer no TiOp-containing layer arranged became. The treatment was carried out in the manner described.

When the results were compared, it was found that the receiving material containing TiOp had visibly fewer stains and better color reproduction than the receiving material which did not contain _{TiO 2.}

909885/0585
BATH ORIGINAL

'■ - ■' j

Claims (14)

5,7806 claims 1. Color diffusion transfer process in which an imagewise exposed photographic material with at least a silver halide emulsion, with the silver halide of which a non-diffusing, with a oxidized primary aromatic amine color developing agent forming a diffusing dye Color coupler is in contact with, in the presence of a primary, aromatic amine color developing agent an alkaline solution and in which the diffusible dye image obtained on a receiving material is transferred, characterized in that the dye image is transferred to a receiving material, that consists of a carrier and 1. an alkali-permeable layer with a mordant for the dye image (mordant layer), 2. an alkali-permeable layer with a non-diffusing, acidic substance, which is placed between the carrier and pickling agent layer (acid layer), 3. an alkali-permeable, light-reflecting layer with a non-diffusing, finely divided white pigment between the acid and the mordant layer (pigment layer) » 909885/0585 : · ■; V- ", Λ BATH ORIGINAL - 35 - .To4 7806- and, if necessary, further intermediate or top layers. 2. The method according to claim 1, characterized in that an image receiving material is used whose pigment layer contains titanium dioxide as the pigment. 3. A process according to claims 1 and 2 _t characterized in that one uses a separate image-receiving material · 4. The method according to claims 1 and 2, characterized in that that one uses a photographic material in which acid and pigment layers between the or the silver halide emulsions and the support and after color development through a stripping layer separated from the silver halide emulsion layer or layers. 5. Process according to Claims 1 to k _t, characterized in that a photographic material with at least one direct positive silver halide emulsion layer is used. 909885/0585 BATH ORIGINAL 6. The method according to claims 1 to 4, characterized in that that there is a photographic material having at least one negative-forming, developable silver halide emulsion layer used. 7. The method according to claims 1 to 6, characterized in that an aqueous, alkaline solution with a k p-phenylenediamine used as a color developer. 8. The method according to claims 1 to 7 »characterized in that that a receiving material is used whose acid layer contains an acidic polymer as the acidic substance. 9. Process according to Claims 1 to 8, characterized in that one is a photosensitive photographic Material consisting of a support with superimposed red, green and blue sensitive gelatin-silver halide emulsion layers with blue-green, purple or Yellow couplers that do not diffuse themselves, but through reaction with an oxidized, primary, aromatic Amine color developer compounds form diffusible dyes, and optionally intermediate and / or Top layers used. 909885/0585 BAD ORK31NAL - ³⁷ - ■ ■ -1047806 10. image receiving material for performing the method according to claims 1 to 9, characterized in that it from a carrier and 1. an alkali-permeable layer with a pickling agent for the dye image (mordant layer), 2. an alkali-permeable layer with a non-diffusing, acidic substance, which is between Carrier and mordant layer is and 3. an alkali-permeable, light-reflecting layer with a white pigment, which separates the acid and the mordant layer is. 11. Image receiving material according to claim 10, characterized in that that the pigment layer is titanium dioxide as a pigment and polyvinyl alcohol as a binder for the titanium dioxide contains. ' 12. Image receiving material according to claims 10 and 11, characterized characterized in that the mordant layer contains Qctadecyltributylammoniumbromid as the mordant. 909885/0585 - 33 - Ί647806 13. Image receiving material according to claims 10 to 12, characterized in that the acid layer as contains acidic substance copoly (methyl vinyl ether / maleic acid). 14. Image receiving material according to claims 10 to 13 »characterized in that the pigment layer contains about 10.76 to 215.23 mg / dm ^{2 of} titanium dioxide and that the weight ratio of titanium dioxide to binder is 1: 5 to 5: 1. 909885/0585
BATH ORIGINAL