Permanent hair color – This contains a mixture of ammonia and peroxides. The main advantage of using permanent hair dye is that it lasts for a long period of time, and as the hair grows the dye only needs to be applied to the roots. However, the color tends to fade if it is exposed to salt water or the sun. Furthermore, the ingredients in the dye may cause temporary dryness and damage. This is the only type of dye that can lighten very dark hues.
Demi-permanent hair color – This contains an alkaline agent instead of ammonia. Because of the absence of ammonia, this dye is thus safer and generally does not do as much damage. It gives off a more natural look but cannot be used to obtain a lighter shade.
Semi-permanent hair color – This doesn’t last as long as permanent varieties and will start to fade after about 6 washes. As it contains hardly any or no developer, peroxide or ammonia, it is ideal for use on damaged or delicate hair. It also gives a more natural look but it doesn’t quite succeed in disguising gray or white strands.
Temporary hair dye – This dye is available in various forms such as rinses, gels, shampoos, foams and sprays. When applied, it makes the hair look more brilliant and vivacious. If often comes in various shades and as its name suggests, it doesn’t last long and can be easily rinsed off with some shampoo.
Hydrogen peroxide and ammonia are the main components in hair colorants that fuse the dye to the hair shaft. When permanent hair color is applied to the hair, these color molecules are able to seep into the hair follicles where they react and expand to such a size that they cannot be washed off. With semi-permanent color the molecules are tiny and only enter the hair as far as the cuticle, where it does not affect the natural pigmentation of the hair. These tiny molecules are eventually washed out of the hair shaft after several washes. The same goes for demi-permanent colorants which fuse with other molecules to form medium-sized molecules but in the hair cortex, which will take longer to wash out.
Hair color trends today are often dictated by what is sported by celebrities and figures that are always in the media. For the current year, many women are following in the footsteps of their favorite stars and are opting for unusual colors such as ombre, which looks great on brunettes; bronde, which is a shade between blonde and brunette; Balayage, which is especially gorgeous on blondes; and platinum blonde, which still remains popular even though it’s difficult to maintain. So if you’re looking to create a stunning new you for this year, begin with your hair by trying on a fabulous hair dye color.