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410 DYES SYNTHESISED IN THE FIBRE

reducing solvent and a copper salt or copper complex, followed by heating,
generates copper phthalocyanine pigment. The final dye or print has excellent
fastness properties.

                NH
4N

NH2

                    Cu2+

                                                         N
                                                    NN
                                             N Cu N
                                                    NN

                                                          N

Figure 19.5 Formation of copper phthalocyanine from appropriate precursors

REFERENCE

1. J Shore, in Cellulosics Dyeing, J Shore, Ed (Bradford: SDC, 1995).
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