Concentrated color developer composition used for silver...

Radiation imagery chemistry: process – composition – or product th – Nonradiation sensitive image processing compositions or... – Developer

Reexamination Certificate

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C430S490000

Reexamination Certificate

active

06902876

ABSTRACT:
A color developer concentrate composition is disclosed, comprising a color developing agent, a sulfite and a compound represented by formula (1), the color developing agent concentration 0.02 to 0.2 mol/l and the sulfite concentration meeting the following requirement:0.1<sulfite concentration (mol/l)/color developing agent concentration (mol/l)<10in-line-formulae description="In-line Formulae" end="lead"?HO—N—(X-A)2  formula (1)in-line-formulae description="In-line Formulae" end="tail"?

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European Search Report EP 03 25 0543.

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