New dyes, dye stabilizers, compounds of ink and improved methods for its manufacture.
2000
Ink composition comprising a porphine whose which general formula is: where M is iron, cobalt or copper; R represents OR1 O3Na or NaO3S SO3Na and R1 represents an alkyl group of 1 to 6 carbon atoms, an aryl group or a substitute aryl group.
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KQI