PROPERTIES OF PEROXIDE BLEACHED HAIR 139 TABLE 3.--PER CENT BREAKAGE AT 20% TABI.E 4. EXTENSION AT BREAK AT 75% EXTENSION IN ORGANIC SOLVENTS RELATIVE HUMIDITY
140 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS ......... .•.`•`•.e•.• e•. .:• ,•.•.• •`•se•.`•M• •e•:•...•,.:.. :•3 •',• ' "•?•'x?•:,•'•2'• '.:t•s.$'•a,'..",.•t• .•-x,•, ,•%'•".•'•.•..'?•.'•':'•..•.%M%-.•.• '• ' . ..• •.•,•" .•':• '•.•.•-'..•:•8:•2'•:•i•!-'." Figure 5.--The conditions after the alkali solubility test of hair samples bleached for 30, 60, 120 and 240 minutes. ubility. A number of wool investigators (3, 10) have reported a linear relationship between the 20 per cent Index and disulfide breakdown and between the 20 per cent Index and alkali solubility. Since the tests de- scribed above show a linear relationship (Fig. 6) between alkali solubility ALKALI-SOLUBLITY OF BLEACHED HAIR % i( c ....... •'o' eo i•o leo 'TIME IN MINUTES Figure 6.--l•elationship between alkali solubility and the time of bleaching in the bleach solution.
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