SU1343384A1 - Developing-fixing solution for chemical-photographic processing of photographic materials - Google Patents

Abstract

The invention relates to photographs, in particular, to a developing solution (PFR) for the chemical-photographic processing of black and white photographic materials. The goal is to increase persistence and prevent staining at pH 12.2 + 0.1. The composition of the Pension Fund, g / l: Trilon B 0.5-1.0, phenidone 0.8-2.0, hydroquinone 9.5-20.0 sodium sulfite anhydrous 35.0-60.0, sodium hydroxide 11.0 -20.0, potassium bromide 10.0-20.0, sodium thiosulfate 35.0-60.0, 2,3,4,5,6-hexanexol 20.0-40.0, water to 1 l. The amount of oxidized hydroquinone after 2 years of storage is reduced by 1.3 times, sodium sulfite - by 1.5 times without staining the solution. 1 table) oo 4 oo oo cx) 4

Description

The invention relates to developed fixing solutions for single x and o co-photographic processing of black and white halogen-silver photographic materials and can be used in the chemical-photographic industry in cases where fast access to the results of photographic registration is required. land, air and sea conditions

The purpose of the invention is to increase the consistency and prevent staining at pH 12.2 + 0, t.

The proposed solution is prepared by dissolving Trilon B in water, then 1,2,3,4,5,6-hexanexol, anhydrous sodium sulfite, hydroquinone, sodium hydroxide, phenidone, potassium bromide, sodium thiosulfate are added.

Example. The developing-fixing solution is prepared in water at pH 12.2 + 0.1 and the following content of ingredients, g: a) Trilon B0.5

Phenidone0,8

Hydroquinone 9.5

Anhydrous sodium sulfate 35.0

Hydroxide

sodium 11.0

Bromide

potassium 10.0

Thiosulfate

rub 35,0

1,2,3,4,5,6-Hexangexol20, 0

Water up to 1 l

b) Trilon B0.7 Phenidone1,2 Hydroquinone 12.0 Sodium sulfite anhydrous 40.0 Hydroxide

rub 16,0

Potassium bromide 15.0

Thiosulfate

rub 45,0

1,2,3,4,5,6-Hexangexol 30.0

Water up to 1 l

c) Trilon BIoO Phenidone 2.0 Hydroquinone 20.0 Sodium Sulfite Anhydrous 60.0 Hydroxide

sodium 20.0

Potassium bromide 20.0

Thiosulfate

on three . 60.0

1,2,3,4,5,6-Hexangexol 40.0

Water up to 1 l

Data on the persistence of the proposed and known solutions, characterized by the amount of oxidized

hydroquinone and sodium sulfite, as well as the color of the solutions presented in the table.

The amount of oxidized substance is found as the difference between the initial and the amount of the substance in the stored solution.

From the table it is clear that the use0

The addition of 1,2,3,4,5,6-hexanexol inhibits the oxidation of hydroquinone and sulfite, sodium, and also prevents staining of the solution. The amount of oxidized hydrochi5 after two years of storage is reduced by a factor of 1.3 in comparison with the known solution, sodium sulfite by a factor of 1.5,

Technical and economic efficiency

Compared to the known solution, the effectiveness of the proposed solution is to reduce the time of chemical and photographic processing by combining the manifestation and fixation, which is possible at the technological level only under conditions of high persistence of the combined developing-fixing

the solution

I

Claims (1)

0 claims A development-fixing solution for chemical-photographic processing of black and white photographic materials containing 5 SCH TRILON B, phenidone, hydroquinone, anhydrous sodium sulfite, sodium hydroxide, potassium bromide, sodium thiosulfate and water, characterized in that, in order to increase preservation of color and prevention of staining at pH 12.2 + 0.1, the solution additionally contains 1,2,3,4,5,6-hexanexol in the following ratio of ingredients, g / l: 5 Trilon B 0.5- 1.0 Phenidone 0.8-2.0 Hydroquinone 9.5-20.0 Anhydrous sodium sulfite 35.0-60.0 11.0-20.0 10.0-20.0 Anti-fixation solution The proposed and, but without 1,2,3, - 4,5,6-hexanexole Editor V.Danko Compiled by E.Platonycheva Tehred A. Kravchuk Proofreader S. Cherni Order 4822/48 Circulation 420 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 35.0-60.0 20.0-40.0 The rest is up to 1 l Content% Shelf life, years 35 39 yellow 40 44 tan brown