Permanent, Demi, Semi, which one should I have?
Nothing substitutes for a good consultation with a professional
colorist but if you find yourself in the haircolor aisle with a puzzled
look on your face, this may shed some light. Other than the new Color,
permanent haircolor containing peroxide and ammonia is capable of
lightening, darkening and covering grey hair 100%.
Permanent products contain ammonia and are mixed with peroxide to
activate the color. It does fade and will need to be touched up within
4 to 8 weeks depending on how fast your hair grows and how far away you
move from your natural color. Color fades very little, covers grey and
does not lighten the hair nor does it do any damage to the internal
structure of the hair as it colors because it does not contain the
peroxide and ammonia that other permanent dyes do.
A demi-permanent color cannot lighten hair, can darken, adds subtle
tones and can blend up to 25% grey. Demi's do not contain ammonia but
are mixed with a low level of peroxide to activate the color. It lasts
almost as long as a permanent color and can be even more permanent when
heat is used during the process.
On permed or color treated hair a demi-permanent can become permanent.
A semi-permanent cannot lighten hair, can darken, will blend or cover
some grey and with repeated applications may not wash out of the hair
completely. Semi's do not contain ammonia or peroxide. On permed or
color treated hair a semi-permanent can become permanent.
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