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Home › Dyeing compositions for keratin fibres, based on 3-nitro-ortho-phenylenediamines, and certain 3-nitro-ortho-phenylenediamines used therein

Dyeing compositions for keratin fibres, based on 3-nitro-ortho-phenylenediamines, and certain 3-nitro-ortho-phenylenediamines used therein

US Patent 5186717 · Granted Feb 16, 1993

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