Popular brands of demi-permanent hair dye include Clairol Natural Instincts, Ion Intense Brilliance, One n' Only Argan Oil and AGEbeautiful Anti-Aging. Demi-permanent hair dye is used for touch ups, enhancements and color darkening. It is used to help maintain color that was previously dyed or is natural.
Demi-permanent hair dye lasts longer than semi-permanent hair dye but is less damaging than permanent color. It is meant to last six weeks or 28 shampoos and offers gray coverage. It is preferred over permanent hair dye because it doesn't not contain ammonia. Ammonia causes hair damage, breakage and lightens the hair. Since demi-permanent hair dye is ammonia free, it can only be used to darken hair. All of the hair brands listed above are ammonia free and can be purchased online, at local drugs stores or Sally Beauty locations.
There are several uses of demi-permanent hair dye. Women use it to blend their grays to create a natural look by transforming grays into highlights. It enhances color without actually altering color. This allows the dye to fade over time and will not result in noticeable hair growth lines. Demi-permanent hair color is an ideal product to use after a perm because of its lack of ammonia. Ammonia negatively interacts with the perm and certain relaxants further damage the hair.