Agfa Gevaert Nv

Pieter Perdieus

Raymond L Florens

Andre Roefs

Peter M Willems

Freddy Henderickx

Francis J Sels

Benedictus J Jansen

To eliminate the 'pi-line' artefact after processing a silver halide industrial photographic X-ray material is disclosed comprising on at least one side of a support, at least one gelatino silver halide emulsion layer and a total amount of silver halide, corresponding to from 6 to 20 g of silver nitrate per square meter and per side, and at least one non-sensitive protective antistress coating, wherein said photographic material comprises at least one vinyl sulphone compound as a hardening agent and at least one polyoxyalkylene compound as a surfactant in at least one of its hydrophilic layers. A method of image forming in said silver halide photographic material is described wherein after exposure to direct X-rays said material is subjected in an automatic processing machine to the steps of developing in a developer comprising as a surfactant at least one anionic alkylphenoxy and/or alkoxy polyalkyleneoxy phosphate ester, sulphate ester, alkyl carboxylic, sulphonic or phosphonic acid and/or a salt thereof, fixing in a fixer which may comprise at least one alpha-ketocarboxylic acid, rinsing and drying.

Silver halide photographic industrial X-ray films

To eliminate the 'pi-line' artifact after processing a method of image formation is disclosed in a silver halide industrial X-ray photographic material, comprising on at least one side of a support, at least one gelatin silver halide emulsion layer and a total amount of silver halide, corresponding to from 6 to 20 g of silver nitrate per square meter and per side, and at least one non-sensitive protective antistress coating, wherein said material further comprises a hardening agent different from a vinyl sulphone compound, preferably formaldehyde, and at least one polyoxyalkylene compound as a surfactant in at least one of its hydrophilic layers, and wherein after exposure to direct X-rays said material is subjected in an automatic processing machine to the steps of developing in a developer comprising at least one anionic alkylphenoxy polyalkyleneoxy phosphate ester surfactant, fixing in a fixer which may comprise at least one alpha-ketocarboxylic acid, rinsing and drying.

Processing of silver halide photographic industrial X-ray films

To eliminate the 'pi-line' artefact after processing a method of image formation in a silver halide industrial X-ray photographic material is disclosed wherein said material comprises on at least one side of a support, at least one gelatino silver halide emulsion layer and a total amount of silver halide, corresponding to from 6 to 20 g of silver nitrate per square meter and per side, and at least one non-sensitive protective antistress coating and wherein said method proceeds by the steps of exposing said material to direct X-rays and processing the material in an automatic processing machine by development, fixing, rinsing and drying, characterized in that said material further comprises at least one vinyl sulphone compound as a hardening agent in at least one of its hydrophilic layers, that development occurs in a developer comprising as a surfactant at least one anionic alkylphenoxy and/or alkoxy polyalkyleneoxy phosphate ester, sulphate ester, alkyl carboxylic, sulphonic or phosphonic acid and/or a salt thereof and that fixing occurs in a fixer which may comprise at least one alpha-ketocarboxylic acid.

Processing of silver halide photographic industrial x-ray films

A photographic silver halide material for industrial radiography comprises a film support and on one or both sides thereof a silver halide emulsion rich in silver chloride and a silver halide emulsion rich in silver bromide either in admixture in the same layer or in contiguous layers. The ratio by weight of colloid binder, e.g. gelatin, to silver halide (expressed as silver nitrate) is from 3:10 to 6:10 and the amount of silver halide corresponds to from 6 g to 20 g of silver nitrate per square meter and per side. The material has been forehardened to an extent such that when it is immersed in demineralised water of 25.degree. C. for 3 minutes there is absorbed less than 2.5 g of water per gram of binder. The material can be processed within a total processing time of less than 5 minutes with a developer and fixer being substantially free from hardening agents and the fixer being substantially free from ammonium ions.

Growing community of inventors

O.L.V.Waver, Belgium

Pieter Perdieus