The hair color
used in the study contained aqua, ammonia, cetylic-stearylic alcohol,
and para-phenylenediamine. The para-phenylenediamine content was not more than 2.0% after dilution.
Hair bleaching powder and volume oxidation cream were weighed at a
ratio of 1:1. During the hair coloring preparation stage, first the
oxidant and then the hair color were put into a mixer bowl at the
determined rates. They were mixed until they were well homogenized.
The oxidant in the specified ratio was used for one tube of hair color.
The mixture was applied to five samples and left for 1 h. After 1
h, the hair was cleaned with water and dried. The same mixture was
prepared again and applied to the dried hair and left for 40 min.
The hair was purified from the bleaching mixture with water and dried
(Figure 1 ).
used in the study contained aqua, ammonia, cetylic-stearylic alcohol,
and para-phenylenediamine. The para-phenylenediamine content was not more than 2.0% after dilution.
Hair bleaching powder and volume oxidation cream were weighed at a
ratio of 1:1. During the hair coloring preparation stage, first the
oxidant and then the hair color were put into a mixer bowl at the
determined rates. They were mixed until they were well homogenized.
The oxidant in the specified ratio was used for one tube of hair color.
The mixture was applied to five samples and left for 1 h. After 1
h, the hair was cleaned with water and dried. The same mixture was
prepared again and applied to the dried hair and left for 40 min.
The hair was purified from the bleaching mixture with water and dried
(
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