Developer for Thermal Positive Type Photosensitive Composition
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United States of America Patent
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Issued Date -
Feb 28, 2008
app pub date -
Oct 25, 2005
filing date -
Oct 28, 2004
priority date (Note) -
Abandoned
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Abstract
Provided is a developer for thermal positive type photosensitive composition, which is easy in developer handling such as pH adjustment, has a developing treatment capability ensuring durability in multiple uses, has little change of pH value over a prolonged period of time and is excellent in durability, has a development capability capable of satisfactorily developing of 100 or more rolls, preferably about 300 to 400 rolls so that the developer can be applied especially to photoengraved rolls for gravure printing, and exhibits a buffering action and is minimized in the aging deterioration of processing capacity so as to realize reduction of the frequency of developer replacement. The developer for thermal positive type photosensitive composition comprises a weak alkaline aqueous solution containing (A) triethanolamine and/or diethanolamine and (B) at least one member selected from the group consisting of: potassium pyrophosphate; sodium tripolyphosphate; and sodium hexametaphosphate.
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