SU1075227A1 - Silver picture intensifier - Google Patents

Abstract

AMPLIFIER silver image on galogenserebr prefecture photographic materigshe with color obrazukntsei component ssdaerzhaschy NIN-etiloksietil-p-phenylenediamine, sodium perborate or peroxide water | kind, resorcinol and water, characterized in that in order to enhance the keeping qualities of the solution of the amplifier and reduce optical serviceability colored veil, it additionally contains hydroxylamine, with the following ratio of ingredients, May.%: NJ N-Ethyloxyethyl-p-phenylenediamine 0.2-0.5 § Sodium perborate or nepeKHCjj water (L kind 0,3-2,0 Resorcin 0,2) -0,4 Hydroxyl n The remaining water is 0.1-0.5 Noah

Description

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The invention relates to photography and can be used to enhance silver images or to obtain monochrome images on black and white silver halogen photographic materials with ordinary and significantly understood silver content.

These vegetation materials contain in the emulsion layer a color forming component of the arc, and the amplification is carried out by the method of catalytic formation of a dye.

A silver image enhancer on a halogen-silver photographic material with a light-forming component containing NIN-ethyloxyethyl-p-phenylenediamine, hydrogen peroxide and water is known. It allows the enhancement of the silver image due to the catalytic formation of a dye in the emulsion layer.

However, the preservation of this amplifier is small, and the footprint treated in such a solution has a high optical density of the veil.

A silver enhancer of a photoglographic photographic material is known, which contains N M-ethyloxyethyl p-phenylenediam hydrogen peroxide or sodium perborate, resorcinol and water. Compared to the previous one, it is more persistent due to the presence of resorcinol 2.

However, the preservation of this, the amplifier does not exceed 3 hours, except that the imprint treated in such a solution also has a high optical density of the veil.

The purpose of the invention is to increase the storage capacity of the booster solution and reduce the optical density of the color veil.

The goal is achieved by the fact that the silver image enhancer on a silver halide photographic material with a color-forming component, containing AND N-etkoxyethyl-p-phenylenediamine, sodium perborate or hydrogen peroxide, resorcin and water, additionally contains hydroxylamine, with the following ratio of ingredients, wt. %:

K / I-ethyloxyethyl-p-.;, -Phenylenediamine 0.2-0.5. Sodium perborate or hydrogen peroxide, 3-2, O Resorcin 0.2-0-0.4 Hydroxylamine 0.1-0.5 Water Rest Essence The invention consists in the fact that the combination of two reducing agents - resorcinol and hydroxyl

on - in the proposed range of concentrations, it maintains the concentrations of the main reagents at the initial level, and, consequently, the activity of the enhancement solution is maintained. When the concentration of hydroxyamine is below 0.1 wt.%, The stabilization effect is insignificant, and when its concentration is above 0.5 wt.%, The enhancement of the retention capacity of the enhancer does not occur. When preparing the enhancer solution, the ingredients are dissolved in the following sequence: resorcinol, hydroxylamine AND K-ethyloxyethyl-p-phenylenediamine and sodium perborate (or hydrogen peroxide). The last two compounds in the proposed amplifier are technical equivalents.

Make photographic paper according to the following method. In 175 ml of bromide-silver gelatin emulsion containing silver 4 g / l (in terms of metal) and gelatin 50 g / l, 1000 ml of distilled water, 50 g of gelatin, 30 ml of 4% solution of the color-forming component are added. P-6 , 13 ml of a 6% solution of the wetting agent CB-1147, 18.5 MP of a 1% aqueous solution of chromium acetate and 18.5 ml of ethylene glycol.

The prepared photosensitive composition is applied to the polyethylene backing paper. The content of silver (in terms of metal) in the obtained photographic paper is 0.25 g / m. It is exposed behind a stepped wedge with a constant of 0.1 and processed. The sequence of operations and processing conditions for low-grade photo paper are presented in Table 1.

The appearance and fixation are carried out in standard solutions, bleaching (step 5) in an aqueous solution of 20 g / l potassium ferricyanide reduction (step b) in an aqueous solution of 1 g / l sodium hydroxide and 2 g / l sodium hydroxide, bleaching - fixation ( operation 11) in an aqueous solution (g / l): Trilon B 25 Sodium tetraborate30

Potassium phosphate monosubstituted15

Iron salt Trilon B60

Sodium sulfate anhydrous 2 Thiourea 3 Sodium thio-sulphate280

In operation 11, the silver particles pass into the bleach-fixing solution, and the image on the paper remains formed from dye particles.

. Operations 6 and 7 provide an increase in the catalytic activity of the silver particles. regarding the amplification process by the proposed amplifier. The compositions of the proposed amplifiers and photographic characteristics obtained during processing are presented in Table 2.

From the above data it follows that at least 72 hours after the preparation of the proposed amplifier, it allows to obtain

in practice, the same basic sensitometric parameters as the freshly prepared amplifier, in addition, the optical density of the colored veil does not exceed 5 0.15, which is 2 times lower than in the well-known amplifier.

Thus, the technical and environmental advantages of the proposed 10 amplifier in comparison with the known (it is the basic sample) are concluded in increased conserva- tion and reduced voip formation.

Table.

niya

Fixing flushing

Whitening

Flushing

Recovery

Flushing

Gain

Flushing

Whitening fixing

Flushing

10-20

5 20 + 2 10-20 20 ± 2 10-20

20tl 10-20 20 ± 1 10-20

20t2 10-20

Proposed

table 2

Continued table. 2

Claims (1)

THE SILVER IMAGE AMPLIFIER on a silver halide photographic material with a color-forming component, containing N-ethyloxyethyl-p-phenylenediamine, sodium perborate or hydrogen peroxide, resorcinol and water, characterized in that, in order to increase the shelf life of the solution _; amplifier and reduce the optical density of the colored veil, it additionally contains hydroxylamine, with the following ratio of ingredients, May.%: Nj N-Ethyloxyethyl-p-phenylenediamine 0.2-0.5 Sodium perborate or hydrogen peroxide Resorcinol hydroxylamine Water 0.3-2.0 0.2-0.4 0.1-0.5 Else