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Hair color is quite a fashion these days and is a perfect camouflage for gray
hairs too. There are many types of hair color available in the market. Permanent
hair color mostly has peroxide and ammonia to cover the gray hair. However, the
growth of new hair creates a demarcation line and can give away the real reason
behind hair coloring. Demi-permanent hair color uses low volumes of peroxide and
no ammonia, causing lesser damage to hair. It covers 80% of gray hairs and lasts
for more than two months. It also fades away gradually. Semi-permanent hair
colors are meant to last from one week to one month and are mostly safe for
hair. They can be used for fun and fad and offers only 10 to 50% cover for gray
hairs. Semi-temporary hair colors stand up to 4-6 times of shampooing your hair.
Temporary hair colors are usually used for party purposes and can be easily
washed off by shampooing your hair. Color rinses are good for toning hairs but
do not last long. Permanent hair color opens up the outer layer of the hair so
that its insoluble formula then reacts with the hair's middle layer and deposit
the color permanently. It is available as creams, gels or shampoos in the color.
The oxidizing agent or developer that comes with it is usually hydrogen peroxide
and works as a catalyst to the oxidation chemical reaction that alters the color
of the hair permanently. The developer comes in various strengths, according to
the brands you are using.
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