Study Set Content:
4-nitro-o-phenylenediamine
Yellow
1,4,5,8-Tetra amino antraquinone
Blue
1,4 diamino antraquinone
Violet
N-2-nitro-p-phenylene diamine
Red
Unmatched by other colorants in the shade palette, durability to shampooing, resistance to fading, and absence of skin staining, the permanent (oxidative) hair colorants have justifiably carved off the largest market share in hair dyes worldwide.
Permanent Hair Colorants
Available in a variety of forms (e.g., lotions, gels, shampoos, creams.), these products deliver reliable results that last until the () hair grows out.
new
Most often, the colorant is supplied as a two component kit consisting of a mixture of ()dye precursor and of a stabilized solution of ()
colorless , hydrogen peroxide.
Occasionally, the peroxide is provided in the form of a powder, such as
urea peroxide or sodium perborate.
The two components are mixed immediately before use, applied to hair, and left for () minutes before being rinsed out with water
20 to 40
The color formation commences upon mixing and involves complex reactions between precursors and the oxidant. The precursors consist of two classes of reactants:
primary intermediates
Secondary intermediates
comprising o- and p-aminophenols and phenylenediamines, which upon oxidation by peroxide form colored quinone imines;
primary intermediates
The latter condense with the imines to yield the final dye molecules.
secondary intermediates
While the color-forming reactions take place in the dye mixture, a significant fraction of the dye precursors diffuse rapidly into the hair together with the hydrogen peroxide forming the colorant moieties throughout the hair fiber. The process is carried out at () pH which also favors the bleaching of the melanin pigment by().
alkaline, H2O2
Resorcinol with PPD COLOR
Greenish- brown
m-pheylenediamine pair with PPD
Blue purple
m-amino phenol
Red-brown
1-Napthrol
Blue Violet
2-Methyl resrocinol
Yellow brown
2-Amino pyridine
Darkgrayinsh-blue
Resorcinol with p-Aminophenol
Yellow-brown
