There are two main types of haircolor: non-oxidative and oxidative. Oxidative haircolors need an oxidizing agent to produce a vivid shade, while non-oxidative colors only deposit color. Non-oxidative hair dyes, on the other hand, are permanent. In the salon, you can find both types in various shades. Non-oxidative hair coloring products are easier to remove than oxidative.
The allergens that are present in oxidative and non-oxidative hair colors are the main difference. Ammonia is a common allergen. Manufacturers are working to remove the chemical from their colors by using finer substances. The Wella Koleston Perfect ME+ hair color remover is a product with 50% less ammonia than traditional permanent color, which is good news for people with sensitive skin.
Non-oxidative hair colors are different from oxidative dyes in that they don’t require opening the cuticle. Temporary hair color doesn’t need the cuticle to be opened or closed, but it has dye molecules attached to the hair shaft. These dyes can last for a long time. They are also very convenient. You have to choose the right haircolors for you.
During the dyeing process, oxidative hair dyes contain both an oxidizing agent (hydrogen peroxide) and a dye intermediate. Paraphenylene-diamine (PPD) is an aromatic compound that is widely used in hair coloring formulations. PPD reacts with hair pigments and produces color products. Non-oxidative dyes for hair don’t contain hydrogen peroxide. Instead, they use preformed pigments.
Semi-permanent color is another non-oxidative type of hair color. It adheres to the outer layer of the hair without having to be activated and does not require a developer. The pigments in this type of color are already visible at the time of application. Because they can’t penetrate the cortex of hair, they’re primarily used in salons. They are also available in many forms such as one-day washable colors for hair.
Permanent haircolors are not made from peroxide and require oxidation, whereas non-oxidative haircolors are non-permanent. Non-oxidative haircolors are formulated to deposit color into the hair. Permanent haircolors don’t require a patch test, but they last through several shampoos. The chemical compounds in non-oxidative hair dyes decolorize the natural pigment in the hair.