106 YEAR BOOK FOR COLORISTS AND DYERS. … wherein Y means a phenol or amin of benzene, naphthalene, or their sulfonic acids. The process consists in combining the tetrazotized diamidophenolsulfonic acid with beta-naphthol and then with a second component— such, for instance, as alpha-naphthol, resorcinol, 2.7-dioxynaphthalene, 2.7. 2.6,…
Dyes and dyeing
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