chemicals : P-phenylenediamine, P-phenylenediamine Sulfate, , O-chlono-p-phenylene Diamine Sulfate, , P-phenylenediamine Dihydrochloride, M-phenylenediamine Sulfate, 1, 2, 4-benzentriol, 5- Amino-o-cresol, , 6-chloro-5-amino-o-cresol, Bis-1, 4-(2-hydroxyethylamino)-2-nitrobenzene, 4-fluoro-3-nitro-aniline, 4-aminophenol Sulfate, 4-chloro Resorcinol, , 4- Amino Cresol, , 4-amino-3-nitrophenol, , 2, 5-diaminotoluene Sulfate, 4-aminopheno.