Developer concentrate and developer prepared therefrom for expos

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Finishing or perfecting composition or product

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252156, 252173, 25217414, 25217421, 25217422, 25217423, 25217424, 252175, 252525, 252544, 430325, G03F 732

Patent

active

051550113

ABSTRACT:
A developer concentrate is described which is used by diluting with tap water to give a read-to-use developer for negative-working exposed reproduction layers on a base. The developer concentrate is a mixture which includes water, an organic solvent, an alkali agent, an anionic surfactant, an n-alkanoic acid and/or its salts, an emulsifier, an alkali-metal salt of an oligomeric phosphate and/or of N-(2-hydroxyethyl)ethylenediaminetriacetic acid as complexing agent and also a tris(hydroxyalkyl) aminomethane as buffering substance. The developer concentrate according to the present invention exhibits, in particular, the advantage that it is stable as a concentrate, i.e., exhibits no phase separations, precipitates or turbidities, etc. . . . , and can be diluted without difficulties to produce the ready-to-use developer. The latter is also stable and exhibits optimum developer properties, in particular for reproduction layers with overcoat.

REFERENCES:
patent: 4469776 (1984-09-01), Matsumoto et al.
patent: 4588836 (1986-05-01), Matsumoto et al.
patent: 4716098 (1987-12-01), Mack et al.
patent: 4851324 (1989-07-01), Hsieh

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