Temporary dyes fade with shampooing and exposure to air. This means they need to be frequently reapplied, which can be damaging. Permanent hair dyes are also known as oxidation, according to Cuannane Phillips. This is because an oxidizer such as hydrogen peroxide and ammonia are mixed with the coloring agent before application. Permanent dyes dont have to be applied as often as semi permanent or temporary colors. The formulation of permanent dyes is very complicated, and manufacturers go to great lengths to attain long lasting color that does minimal damage to the strength and elasticity of your hair. There is a wider range of permanent color, and these color shades are often more natural looking. However, permanent dyes can be more damaging to your hair. The chemicals used are stronger and the mixture usually has to be left on for a longer period of time. Ammonia free hair dyes are composed of monoethanolamine MEA, an organic chemical compound that is a primary amine and primary alcohol. It is used as a replacement p. H adjuster in hair color and used at lower percentages and coupled with emollient oils, making it less volatile and less damaging than ammonia. That being said, just like any other ingredient, the more it is used, the higher the p. H and the greater the damage. No matter how you dye it, you need to care for it. All chemical processes reduce the elasticity stretchability of your hairs and increase their chances of breakage. Therefore, any hair that has been dyed or colored is vulnerable to damage. Cuannane Phillips adds, While this is true, were not suggesting you dont do it, but rather to be aware of how to take the proper steps to hydrate and care for your hair afterwards. The best way to combat dryness, brittleness and breakage is to use a pre shampoo deep conditioning treatment like the Philip Kingsley Elasticizer three days before and after bleaching or highlighting, and then weekly thereafter. This plumps your hair with moisture, making it more elastic and less likely to snap. The correct pre shampoo treatments also add shine, manageability and bounce, she says. Bleaching raises your hair cuticle, causing hairs to interlock and tangle easily, so its also important to condition after every shampoo to flatten the cuticle, seal in moisture, reduce knots and add shine. Lastly, use a smoothing product to help close and smooth your hair cuticle. The Full Justice League: Crisis On Two Earths Cartoon. This will help reduce moisture evaporation and also give your hair a glossier and healthier appearance. These stars are no stranger hair dye PHOTO GALLERYBEFORE YOU GOCelebrities Whove Changed Hair Color. PHOTO GALLERYCelebrities Whove Changed Hair Color. Celebrities Whove Changed Hair Color. Celebrities Whove Changed Hair Color. Anna Kendrick. June 2. January 2. 01. 3Getty. Want more Huff. Post Style beauty content Check us out on Twitter, Facebook, Tumblr, Pinterest and Instagram. For everything else check out our main Huff. Post Style Twitter, Tumblr, Pinterest and Instagram Huff. Post. Style. Do you have a beauty story idea or tip Email us at beautytipshuffingtonpost. PR pitches sent to this address will be ignored.