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Hair shade adjuster

  • US 3,892,845 A
  • Filed: 09/29/1972
  • Issued: 07/01/1975
  • Est. Priority Date: 09/29/1972
  • Status: Expired due to Term
First Claim
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1. A METHOD OF REMOVING THE COLOR OF DYED KERATIN FIBERS WHICH COMPRISES:

  • APPLYING TO THE FIBERS AN EFFECTIVE AMOUNT OF AQUEOUS COMPOSITION COMPRISING A COMBINATION OF FROM ABOUT 1 TO 15 PARTS OF AN OXIDATIVE DYE REDUCING AGENT OF ZINC SULFOXYLATE FORMALDEHYDE, POTASSIUM SULFOXYLATE FORMALDEHYDE, SODIUM SULFOXYLATE FORMALDEHYDE, CALCIUM SULFOXYLATE FORMALDEHYDE ZINCE HYDROSULFITE,POTASSIUM HYDROSULFITE, SODIUM HYDROSULFITE OR CALCIUM HYDROSULFITE AND FROM ABOUT 1 PART TO 25 PARTS OF DISULFIDE REDUCING AGENT CAPABLE OF CLEAVING COVALENT DISULFIDE LINKAGES OF THIOGLYCOLIC ACID, DITHIOTREITOL, POTASSIUM BISULFATE, SODIUM BISULFATE, POTASSIUM BISULFITE, SODIUM BISULFITE, POTASSIUM BBISULFLIDE, THIOUREA, TETRAKISHYDROXYALKI PHOSPHONIUM CHLORIDE, TRIS(HYDROXYALKYL)PHOSPHINE OR TRIS(HYDROXYALKYL)PHOSPHINE OXIDE WHEREIN THE ABOVE ALKYL GROUPS ARE C1-C3 HYDROCARBONS, TREATING THE FIBERS WITH THE REDUCING AGENTS UNTIL THE DESIRED COLOR SHADE IS PRODUCED, AND REMOVING THE REDUCING AGENTS FROM THE FIBERS.

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