Reducing solution for permanent wave
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United States of America Patent
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Jul 26, 1994
Grant Date -
N/A
app pub date -
Oct 19, 1992
filing date -
Oct 19, 1992
priority date (Note) -
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Abstract
Disclosed is an improved reducing solution comprising: a) from about 1.0% to about 11.0% by weight of cysteamino hydrochloride; b) from about 1.0% to about 24% by weight of a reducing agent selected from a group consisting of salts and esters of thioglycolic acid, L-cysteine, thiolactic acid, and thiomaleic acid, dithioerythreitol, and dithiothyreitol; c) from about 0.5% to about 7% by weight of isoascorbic acid; d) a base in amounts sufficient to adjust the pH from about 6.5 to about 8.5; and e) water in amount sufficient to total 100 percent of the solution; the weight percents being based upon the total weight of the solution.
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