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Translucent hair color8/6/2023 ![]() There are, however, many different types of hair tone color variants out there for you to choose from. With temporary dyes, the cuticle isn’t opened – the dye molecules are attached to the outside of the hair shaft, which means the colour washes off easily.Want to get rid of brassy hair tones that are ruining your recently bleached look? Using hair toner is your go-to option, and will help you transform your hair in no time. The difference between permanent and temporary dye is the all-important cuticle opening/closing process. ![]() Related Post: What to Expect After You Bleach Your Asian Hair Temporary/semi-permanent dye That’s why the dye usually looks nothing like the colour you want at the start (it’s usually white), then the colour slowly appears as you use it – the dye precursors need to react before turning into the final colour. These are mixed just before applying it to hair. In an oxidative dye, the ammonia and dye precursors are usually in one container, while the peroxide is stored in a separate container. Some damage occurs during the opening/closing process – I’ve exaggerated it in the diagram above. Closing the cuticle – The cuticle is closed after dyeing, usually with an acidic conditioner. Reacting precursors to form the dye – The precursor molecules react with each other, with the help of hydrogen peroxide and ammonia, to form the final, large dye molecules, which are too big to wash out easily.ĥ. Adding dye precursors – Small precursor molecules, which later react to form the final dye, soak into the cortex through the gaps in the open cuticle.Ĥ. for dark hair), this can be done as a completely separate step, with the addition of persulfate salts.ģ. ![]() Hydrogen peroxide reacts with the coloured melanin chemicals in the hair and turns them into colourless chemicals. Bleaching the hair – To help the new colour show up more prominently, hydrogen peroxide is used to bleach the hair, making it lighter. This is done using an alkaline chemical, usually ammonia (the mixed hair dye is usually at a pH of around 10).Ģ. Opening up the cuticle – The overlapping cuticle scales need to be lifted so the chemicals in the dye can get to the cortex. These usually aren’t distinct steps, especially if you’re using a one step dye – they’re all happening around the same time.ġ. There are a number of steps involved in the use of oxidative dyes. Permanent and demi-permanent hair dyes use oxidative dyes, which form in the hair when the dye is applied. The main difference between permanent/demi-permanent hair dyes, and temporary/semi-permanent dyes is the type of dye they contain. Related Post: How do heat protectant hair products work? Permanent and Demi-Permanent Hair Dyes ![]() These terms are sometimes mixed up – you might see semi-permanent hair dyes that contain hydrogen peroxide, for example – so it’s always best to check the ingredients. Temporary or semi-permanent dye (direct dye): no lightening of hair, does not contain peroxide, contain dyes that are already formed before application, washes out in a few washes.Demi-permanent: causes mild lightening of hair, contains 1-2% hydrogen peroxide, contains oxidative dyes that form during application, lasts around 6 weeks.Permanent: causes some lightening of hair, contains 3-6% hydrogen peroxide, contains oxidative dyes that form during application, does not wash out significantly but may fade.There are a few different types of hair dye, and there’s generally an inverse relationship between damage and how long the dye lasts (the longer-lasting it is, the more damaging it’ll be): Related Post: Getting Hair Dye Off Your Hands Different Types of Hair Dye When the cells lie flat, light bounces off and your hair looks shiny. ![]()
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