Phthalogens:- Explained in brief
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Phthalogens:
Phthalogens are the precursors for phthalocyanines produced on cotton by dyeing and printing. The intermediate diiminoisoindoline is mixed with certain additives such as copper salts and a organic solvent and the mixture is printed or padded on to cotton, on drying or steaming the metal phthalocyanine is formed in situ.
