The copper phthalocyanine dyes are produced by introducing solubilizing groups, such as one or more sulphonic acid functions in CPC structure . These dyes find extensive use in various areas of textile dyeing (Direct dyes for cotton), for spin dyeing and in paper industry. Direct blue 86 is the sodium salt of CPC - sulphonic acid whereas direct blue 199 is ammonium salt of the CPC-sulphonic acid. The organic amine salts of these sulphonic acids used as solvent dyes because of their solub...