A - Human Necessities – 45 – D
Patent
A - Human Necessities
45
D
A45D 19/00 (2006.01) D06P 3/00 (2006.01)
Patent
CA 2049826
ABSTRACT OF DISCLOSURE The present invention provides an improvement in a process for dyeing hair on a live head wherein the hair is treated with metal ion in a pretreatment step to accelerate subsequent dyeing of the hair and the treated hair is then subjected to an oxidative or autooxidative dyeing step. The invention serves to reduce staining of the scalp occasioned by the dyeing step. The improvement comprises: (1) between the pretreatment step and the dyeing step the scalp of said live head is subjected to vigorous massage, rubbing, combing or brushing, for a time sufficient to reduce staining of the scalp occasioned by the dyeing step; or (ii) sufficient time is permitted to elapse between the pretreatment step and the dyeing step to reduce staining of the scalp occasioned by the dyeing step: or (iii) between the pretreatment step and the dyeing step the scalp of said live head is subjected to vigorous massage, rubbing, combing or brushing, and time is permitted to elapse between the pretreatment step and the dyeing step, the duration of the massage rubbing, combing or brushing coupled with the duration of the elapsed time between the pretreatment and dyeing steps being sufficient to reduce staining of the scalp occasioned by the dyeing step.
Barrigar & Moss
Bristol-Myers Squibb Company
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