DE1239195B - Black toener for the silver salt diffusion process - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

G03c

German class: 57 b -14/02

Number: 1 239 195

File number: F 41222 IX a / 57 b

Filing date: November 8, 1963

Open date: April 20, 1967

The invention relates to a recording material for the silver salt diffusion process with a heterocyclic, mercapto compound containing several N atoms as a black shade.

In the silver salt diffusion process, it is known to use black toners which are applied to the image receiving layer act so that no yellow or brown images are obtained. As a black tint heterocyclic mercapto compounds containing several N atoms are known (German patent 890 755).

The object of the invention is to provide blackers that blacken the images more deeply than the known ones Black tone.

The subject matter of the invention relates to a recording material, an image receiving material and a developer for the silver salt diffusion method with a heterocyclic, plural Mercapto compound containing N atoms as a black shade and is characterized by that at least one of the three materials has at least one compound of the formulas

R '

C-SH

Black tone for the silver salt diffusion process

Applicant:

Fuji Shashin Film Kabushiki Kaisha, Ashigarakami-gun, Kanagawa-ken (Japan)

Representative:

Dr. G. W. Lotterhos

and Dr.-Ing. H. W. Lotterhos, Patent Attorneys, Frankfurt / M., Annastr. 19th

Named as inventor:

Fumihiko Nishio, Odawara-shi, Kanagawa-ken; Mitsunori Sugiyama,

Tatsuya Tajima,

Ashigarakami-gun, Kanagawa-ken (Japan)

Claimed priority:

Japan November 12, 1962 (49 696)

30 compound CH ₃

contains, where R is hydrogen or a (Ci-C ₅ ) -alkyl group and R 'is hydrogen, halogen, a (Ci-C ₅ ) -alkyl group or a compound nitro group.
The following connections are suitable:

40 connection 1

C-SH

CH ₃ O

Connection 2

CUT

C-SH

45

link

C-SH

C-SH

709 550/317

The compounds can be used individually or in combination with the recording material, the image receiving material or added to the developer or all or two of them.

According to one embodiment of the invention, the developer contains 0.001 to 1 g / l, the silver halide emulsion of the recording material 0.001 to 1 g / kg and the solution for the preparation of the image receiving layer 0.001 to 1 g / l of the black color.

example 1

To produce a recording material, photographic paper with an extra hard Coated silver halide emulsion of the following composition:

Silver chloride 1.2 g / m ²

Benzotriazole 0.005 g / m ²

Hydroquinone 0.2 g / m ²

Gelatin 4.2 g / m ²

The dried emulsion layer was imagewise exposed and a developer as follows Composition treated:

20th

Hydroquinone 12 g

1-phenyl-3-pyrazolidone 0.5 g

Sodium sulfite, anhydrous 70 g

NaOH 15 g

Water to fill up to 1000 ecm

During or after development, the developer-containing emulsion layer was on the recording material 20 seconds in contact with the image receiving material. For the latter there was a paper coated with a coating liquid of the following composition:

Gelatin 5 g / m ²

Sodium thiosulphate, anhydrous ... 1.5 g / m ²

Thickness 0.5 g / m ²

Colloidal silver sulfide 0.002 g / m ²

Compound 1 0.2 g / m ²

When the image receiving material was separated from the recording material, a black color was obtained positive picture.

The image-receiving layer, which was applied to a transparent support, had the following composition:

Gelatin 4 g / m ²

Polyvinyl alcohol 1.5 g / m ²

Compound 4 0.06 g / m ' ²

Barium sulfate 0.4 g / m ²

Palladium sulfide, colloidal 0.003 g / m ²

After processing the materials as in Example 1, a black image was obtained on the Image receiving material.

Example 4

In a developer according to Example 3, compound 5 was replaced by 0.02 g / l of compound 1, and in the image receiving material according to example 3, compound 4 was replaced by 0.05 g / m ² of compound 3. P ^ i the same treatment as in Example 3, a black positive image was obtained.

Claims (4)

Patent claims: 1. Recording material, image receiving material and developer for the silver salt diffusion process with a heterocyclic mercapto compound containing several N atoms as a black shade, characterized in that that at least one of the three materials, at least one compound of the formulas 40 Example 2 45 In a recording material according to Example 1, benzotriazole was replaced by 0.05 g / m ² of compound 3. By the same treatment as in Example 1, a black positive image was obtained even if Compound 1 was omitted from the image receiving material. Example 3 The recording material as in Example 1 was reflex-exposed and with a developer the following composition: Hydroquinone 18 g 1-phenyl-3-pyrazolidone 0.5 g Compound 5 0.05 g Sodium sulfite, anhydrous 60 g Sodium thiosulphate, anhydrous ... 8 g NaOH 14 g Water to fill up to 1000 ecm or contains, where R is hydrogen or a (Ci-Cs) -alkyl group and R 'is hydrogen, Halogen, a (Ci-Cs) -alkyl group or a nitro group. 2. Developer according to claim 1, characterized in that it is 0.001 to 1 g / l of the black tone contains. 3. Recording material according to claim 1, characterized in that it is in the silver halide emulsion Contains 0.001 to 1 g / kg of the black tone. 4. Image receiving material according to claim 1, characterized in that it is an image receiving layer which is made from a solution mixed with 0.001 to 1 g / l of the black tone has been. Considered publications:
German Patent No. 890 755;
French patent specification No. 1 298 153.