ALTERNATIVE PHTHALOCYANINE DYES SUITABLE FOR USE IN OFFSET INKS
First Claim
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1. A phthalocyanine salt comprising one or more sulfonate groups, wherein a counterion of at least one sulfonate group is an ammonium cation comprising at least 15 carbon atoms.
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Abstract
A phthalocyanine salt suitable for formulation in a solvent-based or oil-based ink vehicle is disclosed. The phthalocyanine comprises one or more sulfonate groups and a counterion of at least one sulfonate group is an ammonium cation comprising at least 15 carbon atoms. Ammonium salts of sulfonated gallium naphthalocyanines exemplify such phthalocyanine salts.
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- 1. A phthalocyanine salt comprising one or more sulfonate groups, wherein a counterion of at least one sulfonate group is an ammonium cation comprising at least 15 carbon atoms.
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