Then proceed to the front parts and finally to the hair around the face, where the hair is the most damaged and the softest, and therefore lighten the fastest. Do not economize on the lightening mixture! Ideally, the hair should be completely covered. Only in this way you can achieve the best and the most even results without stains etc.
When bleaching the roots, be careful to apply the solution only to the grown out hair, otherwise you may create an unsightly overlapping. The reason is that hair near the skin lightens the fastest. It is because of the heat generated by the head. For this reason, leave this part of hair close to the scalp to the very end.
Go from the back side of the head to the front. Leave it on for the defined time. STEP 2: Shortly before the end of the application time prepare the same mixture and apply it evenly to the roots, then leave it on for several more minutes.
Root Application STEP 1: Apply the mixture only to the roots; be careful not to apply the colour to the already coloured parts. Leave on for the time indicated in the instruction leaflet.
STEP 2: If necessary, once the application time has passed, wet the hair with water and emulsify the colour to lengths and ends and leave it on for a while. This will naturally mask the overlap between the old and the new colour. Prevent you hair from growing out to much.
Repeat the application of bleach as soon as possible, preferably when the roots are maximum 2. In this way, the colour of your hair will look more even. Development Time The application time varies based on the desired level of lift, quality, texture and structure of your hair.
It is usually about minutes. After this time the prepared mixture loses its lightening effect. Make sure to always follow the instructions for use. Every product can work differently. During the application time, check the process regularly about every 10 minutes , and remember that dry hair will get a tone lighter.
During the application of the bleach, your head may start itching and you may feel a slight stabbing pain. A slight burning sensation is absolutely normal. Be also aware that anytime you decide to lighten your hair, you will always fight warm tones. It is therefore extremely important to watch the exact time during bleaching.
If you wash the colour out too early, it can leave a reddish or yellowish tinge in your hair, as the bleaching process starts from red through yellow to the final blonde see picture below. Do not exceed the development time , even if you do not achieve the desired colour. This is a common thing, especially for people with darker hair or whose hair is more resistant to colouring and bleaching. You will need to perform several applications to reach the desired blond colour.
Remember: Proper treatment after colouring is crucial for restoring the acidic pH in your hair, so do not skip it. Last Valuable Tips Wait at least 2 weeks between the next colouring service to give your hair time to recover. Be aware that bleached hair is fragile and damaged even in their best condition, so take good care of it. Use products specifically designed for blonde hair: violet shampoos, shampoos for blonde hair , conditioners and hair treatments for blonde hair.
In the following months also avoid using deep cleansing shampoos and anti-dandruff shampoos which tend to remove colour. If possible, avoid thermal styling which can damage your hair. You probably have some under your kitchen sink sodium hypochlorite , but that is only one kind of chemical with bleaching properties amongst many.
We can sort the chemicals with bleaching capability into two general groups: those that work via reducing and those that work via oxidizing. Bleaching by reduction is how bleaches like sodium hydrosulphite achieve their faded hues. They react with a chromophore the part of a molecule that is colourful and decrease the number of carbon-oxygen bonds in it, making it uncoloured. The oxygen in the air is actually able to reverse bleaching-by-reduction to a certain extent.
For that, we typically use H 2O2 or hydrogen peroxide. H 2O2 still chemically alters the chromophore, but instead of decreasing the number of carbon-oxygen bonds, it increases them.
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Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Featured Video. Cite this Article Format. Helmenstine, Anne Marie, Ph. The Science of Hair Coloring. Sulfuric Acid and Sugar Demonstration.
Your Privacy Rights. These include everything from heat-styling with blow-dryers and tongs, to the effects of sun, rain and wind. In other words, the more often you bleach or highlight your hair, the more damaged it will be. If you are suffering from damaged hair, our Clinics in London and New York specialise in hair and scalp treatment and are here to help.
Not only does bleaching raise the outer cuticle, it also damages the bonds inside the hair too hair is made up of three types of bonds: hydrogen, disulfide and salt bonds causing them to weaken and break, and when the internal structure of the hair is compromised, strands are more likely to split and snap. This is why it's imperative to regularly apply treatments like our Bond Builder Restructuring Treatment that strengthens existing bonds while reconnecting broken ones.
Star ingredient Advanced Bond Rebuilding Technology works within the hair shaft, to protect bonds from damage, leaving bleached locks stronger and more resilient. What's more, strength continues to improve use after use, making it a must-have within every hair care regime and particularly if you bleach your hair regularly.
This is a particular hazard during heat styling. Heat-protectant sprays and serums, such as our Perfecting Primer Heat Protection Spray , will help shield your strands from moisture evaporation under blow-dryers, irons and tongs.
Wear a lightweight, protective spray or serum throughout the day.
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