Unlike an oxidized permanent hair dye, since the semi-permanent hair dye shows acidity of pH 3 to 5, it does not cause hair damage due to hair swelling.

Unlike their permanent dye precursors, the vat dyes already contain their chromophore, and therefore do not require the presence of an oxidative agent to ...

Such products, however, damage hair and fail to strip or bleach semi-permanent coloring from treated hair. In DE 2,024,799, it is taught to use an aqueous ...

... does not associate hair damage with this oxidizing agent. The various hair ... Semi-Permanent hair-coloring Loving Care Ash Blonde No. 73, marketed by ...

Permanent hair dyes have excellent dyeing effect and color persistence, but scalp irritation and skin damage by oxidizing agents and alkalis, itching and ...

Semi-permanent hair dyes, often known as direct dyes, are small molecules that can pass through the cuticle into the cortex easily and without damaging the ...

Semi-permanent hair dyes do not penetrate into the hair because the ... It has the advantage of being able to be dyed without damage.However, since the ...

Particularly for the coloring agent for "semi -permanent hair dyes" which ... The degree of hair cuticle damage due to the use of the oxidation hair dye ...

The toxicity of current permanent and semi-permanent synthetic hair color formulations is such that many U.S. physicians do not recommend hair coloring during ...

easy Hair washing and cleaning will promote this procedure. suitable semi-permanent dyes for use in the compositions of the invention shut down HC Blue 2, HC ...

Hair dyes are classified into temporary hair dyes, semi-permanent hair dyes, and permanent hair dyes. ... The oxidation mechanism does not remove color from the ...

... permanent, demi-permanent, semi-permanent or temporary hair dye compositions. ... Direct dyes, such as nitro dyes do not require oxidation to dye the hair.

The pigments used in this type of hair color are called “direct dyes” and they are different from those used in oxidative dyes. Semi-permanent hair dyes do not ...

... will impart permanent color to the hair. While oxidative color is ... hair prior to coloring the hair with the semi-permanent dye composition. the ...

Today, dyes for hair can be classified as temporary, semi-permanent and permanent. ... There is no evidence of hair damage, and the hair is actually left in good ...

The second type of dye used in semi-permanent hair color has a larger ... When the hair is colored with the composition, the color will not wash out as quickly.

Semi permanent hair color does not give the consumer any control regarding ... will not cause hair damage. An unexpected discovery of the present ...

... permanent hair dyeing agent, so it does not cause damage by inflating the hair and does not use ammonia and hydrogen peroxide. There is an advantage that it ...

The present invention relates to a solid-phase cosmetic hair-coloring composition having temporary hair-coloring effects, and to a method for manufacturing ...

It does not contribute to the development of color but does contribute to hair damage. ... A demi-permanent hair coloring is similar to the permanent hair ...