Method for permanent waving and straightening of hair

Details Method for permanent waving and straightening of hair Method for permanent waving and straightening of hair

1992-02-06

1994-03-15

Willis, Jr., Prince

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

Proteinaceous fibers

132203, 132204, 132209, 424 71, 424 72, A61K 706, A61K 709, A45D 704

Patent

active

052942309

ABSTRACT:
Hair is waved or straightened by maintaining it in tightly curled or in straightened configuration in contact with an aqueous waving lotion containing sulfite, bisulfite, or hydrosulfite together with a water-soluble mercaptan, at a molar ratio of 5:1 to 1:7.5, rebuilding with an aqueous lotion at pH 7 to 12 free from cross-linking, oxidizing, or reducing agents, and subsequently applying a neutralizer solution. Minimal damage to the hair results from use of the specified molar ratio. When waving hair, an optional additional step between cross-linking and neutralizing comprises maintaining the rebuilt hair in stress-free condition in contact with the ambient atmosphere to permit the curled hair to relax to the desired extent.

REFERENCES:
patent: 3017328 (1962-01-01), Childrey
patent: 3644084 (1972-02-01), Hsiung
patent: 3981987 (1976-09-01), Linke
patent: 4214596 (1980-07-01), Kaplan
patent: 4322401, Harada
patent: 4494557 (1985-01-01), Nagel
patent: 4504466 (1985-03-01), Eda
patent: 4602648 (1986-07-01), Syed
patent: 5041286 (1991-08-01), Donnelly et al.
patent: 5071641 (1991-12-01), Lewis
patent: 5165427 (1992-11-01), Borish
patent: 5223252 (1993-06-01), Kolc et al.

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