The most realistic virtual hairstyler - WallStreet Journal &
Vogue Magazine   Bleach is a chemical agent used to lighten or
disperse pigment from the hair shaft in a permanent manner.
Bleaching is useful when you want to go from a darker color to a
much lighter one, but beware because bleaching is quite harsh on
the hair and over-processing must be avoided.  Bleach Activator
Bleach activator is generally hydrogen peroxide and it's needed
to open the hair cuticle to allow the bleaching agent inside the
hair shaft. It also chemically reacts with the bleach to de-
colorize pigments. The higher the volume of peroxide (activator)
used, the faster and lighter the hair becomes- but the more
damaged it can get too.   Bleaching is the actual process where
lightening or de-colorization occurs, starting from the largest
(darkest) pigments. This is typically known as the "7 stages of
bleaching": black - brown - red-brown - red - orange - yellow -
white (in that order).  Clay Lighteners  Clay lighteners are
lightening pow