380 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS ß /,...__- ß .• -q . ,.• • . _. . • _ . Figure 3a. Brown hair, 15 cycles of chlorination at pH 7. ,•. ..• 3, -ø •, ...• .. • . "3• 'i"• ß i' [. ß . Figure 3b. Blond hair, 30 cycles of chlorination at pH 7.

CHLORINATION OF HAIR AND pH 381 ¾, ,,. Figure 4a. Brown hair, 5 cycles of chlorination at pH 2. Figure 4b. Brown hair, 15 cycles of chlorination at pH 2.

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