D - Textiles – Paper – 06 – P
Patent
D - Textiles, Paper
06
P
167/302
D06P 1/645 (2006.01) D06P 3/02 (2006.01) D06P 3/58 (2006.01)
Patent
CA 1073817
PROCESS FOR DYEING HAIR IN WHICH THE DEPTH OF SHADE IS GRADUALLY INCREASED IN SUCCESSIVE TREATMENTS A B S T R A C T A process for dyeing hair by application of a mixture of colorant solution of primary aromatic amines and aminophenols and an oxident containing H2O2 or a peroxy der- ivative for a predetermined time period followed by a rinse removal of the residual mixture. The improvement comprises (a) applying said colorant-oxident mixture in successive applications to gradually get rid of the undesirable hair color, i.e. gray, wherein (i) the time period of application of the mixture being short, in the order of five (5) minutes and of a predetermined length for each subsequent application, (ii) the quantity of colorant solution is predetermined and constant through all applications, (iii) the quantity of oxident in the mixture in the first application is of an initial predetermined amount of oxident approximating stoichiometric and successive applications having predetermined increased qualities of oxident above said initial predetermined quantity; (b) each mixture having the ability to produce a predetermined oxidation color on ordinary human hair; and (c) each such color being a deeper shade than the preceding application, whereby the user can stop the coloration process at any desirable color attainment and thereafter maintain such color level by repeating the application with the mixture of colorant and oxident last used.
277720
Lapidus Herbert
Shansky Albert
Combe Incorporated
Na
LandOfFree
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