Composition for dyeing keratin fibers
A keratin fiber and composition technology, which can be applied to cosmetic preparations, medical preparations containing active ingredients, cosmetics, etc., can solve problems such as keratin fiber damage
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Embodiment 1-2 and comparative example 1-2
[0302] [preparation]
[0303] The cosmetic compositions for hair coloring according to Examples 1-2 (Ex. 1 and Ex. 2) and Comparative Examples 1-2 (Comp. Ex. 1 and Comp. Ex. 2) were each expressed by mixing at room temperature 1 and pour it into a transparent container with the same volume. The numerical values of the amounts of ingredients are all based on "% by weight" as the active raw material.
[0304] [Evaluation of color difference]
[0305] Each composition according to Examples 1-2 and Comparative Examples 1-2 was applied uniformly to 1 gram of a lock of 100% white natural human hair. The tresses were then left to stand at 40° C. for 15 minutes, followed by washing with water, shampooing, rinsing once and drying the tresses. Minolta CM-580 was used to evaluate the color difference of the tresses before and after the above-mentioned dyeing process. The ΔE* (between the color of the undyed original tress and the color of the dyed tress) was calculated based on CIE...
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