Aqueous developer for lithographic printing plates with...

Details Aqueous developer for lithographic printing plates with... Aqueous developer for lithographic printing plates with...

G - Physics

03

F

G03F 7/32 (2006.01)

Patent

CA 2098169

Aqueous alkaline developing compositions useful in the development of negative-working lithographic printing plates are comprised of an organic solvent, an anionic surface active agent, an alkali metal tetraborate, oxalate or nitrate, an aliphatic monocarboxylic acid, an aliphatic dicarboxylic acid and sufficient alkaline buffering system to provide an alkaline pH. The developing composition is resistant to oxidation, highly effective in dissolution-type processing, and able to effectively desensitize the background areas of the printing plate.

Compositions alcalines aqueuses utiles pour le développement de plaques négatives d'impression lithographique. Elles sont constituées des éléments suivants : solvant organique, surfactif anionique, tétraborate, oxalate ou nitrate de métal alcalin, acide aliphatique monocarboxylique, acide aliphatique dicarboxylique, et suffisamment d'un système alcalin tampon pour donner un pH alcalin. Ces compositions résistent à l'oxydation, sont très efficaces dans les procédés de type dissolution, et permettent de désensibiliser efficacement les zones de fond de la plaque d'impression.

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