Hair straightening process and hair curling process and composit

Toilet – Nail device – Compound tools

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424 71, A45D 700

Patent

active

043042449

ABSTRACT:
Compositions and methods for curling hair and for straightening hair are disclosed, wherein the compositions contain, as the principal active ingredient thereof, guanidine hydroxide. The guanidine hydroxide may be conveniently prepared by reacting calcium hydroxide and guanidine carbonate.
Hair is curled by contacting the hair with the composition while the hair is on curlers, or otherwise maintained in a curled configuration. After the desired treatment time, the hair is rinsed and neutralized, with long lasting curls of the so-called "permanent wave" nature resulting.
Hair may be straightened by contacting the hair with the composition and maintaining the hair in a generally straight configuration over at least a portion of the time that the hair is contacted by the composition. Thereafter the hair may be rinsed and neutralized.

REFERENCES:
patent: 2180380 (1939-11-01), Willat
patent: 2261094 (1941-10-01), Speakman
patent: 3154470 (1964-10-01), Braun
patent: 3971391 (1976-07-01), Bore
Carl R. Noller--Chemistry of Organic Compounds-1956 pp. 309-310.
James B. Conant--The Chemistry of Organic Compounds-1939-p. 258.

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