Developer concentrate and developer prepared therefrom for expos

Details Developer concentrate and developer prepared therefrom for expos Developer concentrate and developer prepared therefrom for expos

1990-11-15

1992-10-13

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Finishing or perfecting composition or product

252156, 252173, 25217414, 25217421, 25217422, 25217423, 25217424, 252175, 252525, 252544, 430325, G06F 732

Patent

active

051550121

ABSTRACT:
A developer concentrate is described which is used by diluting with tap water to give a ready-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, a buffering substance and, as a complexing agent, an alkali-metal salt of an oligomeric phosphate and/or of N-(2-hydroxyethyl)ethylenediamino-triacetic acid. 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.

REFERENCES:
patent: 3867147 (1975-02-01), Teuscher
patent: 4469776 (1984-09-01), Matsumoto et al.
patent: 4588836 (1986-05-01), Matsumoto et al.
patent: 4716098 (1987-12-01), Mack et al.

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