Hair dyeing
Types
of hair colorants
There are three general categories of hair colorants, defined by the duration the colour remains on the hair. However, the distinctions between these various categories have been somewhat blurred in the past 10-15 years, due to new dyestuffs and improved formulations.
There are three general categories of hair colorants, defined by the duration the colour remains on the hair. However, the distinctions between these various categories have been somewhat blurred in the past 10-15 years, due to new dyestuffs and improved formulations.
Temporary
colouring
Temporary colorants are removed by the first shampooing. These products are usually called 'colour rinses' and use high molecular weight ionic colorants which are deposited on the surface of the hair with no penetration into the cortex. These are acid dyes with minimal affinity for the overall anionic nature of hair, and are generally used for a specific event or occasion.
Click here for more information
on acid dyes.
Also See:
