What Is Demi Permanent Hair Color. It is mainly used to cover greys or to darken hair. It does not lift the base color but helps in toning highlights or correcting the existing color by adding intense depth and dimension to it.
According to zoë carpenter for joico a crème demi permanent hair color is an alkaline ammonia free product that comes in a variety of shades and has the ability to either cover gray hair or blend hair color in a safe and natural manner. The color molecules are not as large as well so they wash out in about 24 shampoos. Unlike longer lasting versions it has no ammonia and a very low peroxide content.
It does not lift the base color but helps in toning highlights or correcting the existing color by adding intense depth and dimension to it.
Demi permanent color is in between a semi permanent and permanent hair dye. The color molecules are not as large as well so they wash out in about 24 shampoos. Ideally it lasts up to 24 shampoos. Typically this type of dye can last anywhere from 12 to 24 washes before completely washing out.