How Long to Leave Bleach in Your hair

This article will explain how long to leave bleach in your hair. In addition, you will learn about the effects of bleach on your hair, the Stretch test, and how to choose between hydrogen peroxide and ammonia. Read on to find out which is best for you! And don’t forget to read the Ammonia vs Hydrogen Peroxide comparison to learn more! Lastly, if you’re still undecided, check out our guide on what type of bleach you should use and why it’s important.

Length of time you should leave bleach in your hair


How long you should leave bleach in your hair depends on your current color and history of dyeing. Lighter, virgin hair does not require as long of a bleach treatment. Five to ten minutes of bleaching is enough for most people. To get the best results, follow the manufacturer’s instructions carefully. The longer you leave the bleach in, the more damage your hair can receive. Check your hair frequently to see how long it takes to turn your hair from light to dark and from yellow to white.


How long you should leave bleach in your hair depends on two factors: the color of your hair and its thickness. For fine hair, a 15-minute bleaching session is sufficient. For thicker hair, a half-hour treatment is needed. For a full head of blonde, a 30 minute bleaching session may be necessary. If you have very thick hair, you may have to divide the bleaching process into two 15-minute sessions.

Effects of bleaching on hair


The process of bleaching your hair can strip moisture. The chemicals used to bleach your hair cause the cuticles to separate, which is necessary for the dye to penetrate. Bleaching also makes your hair more porous, making it more prone to breakage and dryness. Depending on the type of hair you have, you may have to use toner to cancel out any pigment that has been lifted. If you don’t want your hair to become this color, you should avoid bleaching your hair unless you are willing to use expensive products or frequent touch-ups.


To remove the yellow tint and restore the original hair color, bleaching your hair will involve oxidation. The hydrogen peroxide will bind to melanin, which is a dark pigment in your hair. By dissolving the melanin, the hair will become lighter in colour. However, remember that bleaching can damage your hair and should be done only if you’re absolutely certain you’re happy with the color.

Stretch test


To determine whether or not your hair is porous before bleaching, you should do a simple test. Try to stretch a tiny section of your hair. This will help you determine the amount of moisture and protein your hair is missing. This information can help you care for your hair and style it properly. Performing a hair stretch test is very easy, and it will also make caring for your hair a lot easier. Simply grab a tiny section of your hair from different areas of your head and stretch it with your thumb and finger.


The next time you’re going to bleach your hair, perform a strand test. You’ll want to see if your hair stretches easily. This means that your hair is not very brittle. If the strands stretch easily, your hair is likely protein-deficient. You should also make sure your hair is not too dry or too oily to avoid bleaching. This will help you determine if the hair is ready for bleaching.

Ammonia vs hydrogen peroxide


Ammonia and hydrogen peroxide are the two most common ingredients for hair bleach. Often used together, these two substances lighten the hair very slowly and can cause damage. Often, manufacturers will use another oxidising agent in their products to make them safe to use on the hair. These substances are just as harmful as hydrogen peroxide. Repeated bleaching will permanently raise the hair cuticle, which will cause rapid loss of moisture.


The difference between hydrogen peroxide and ammonia in hair dye is mostly in how these two chemicals react with the hair. Hydrogen peroxide bleaching can damage the structure of the hair, but it is less harmful than ammonia bleaching. Hydrogen peroxide is also used as a temporary colorant. Temporary hair colors work by depositing acidic dyes on the hair. The peroxide reacts with the acidic dyes on the hair’s surface. Eventually, the colorant molecules will link together to form a larger complex inside the hair shaft.

20 volume developer vs 30 volume developer


You might have heard of 20 volume developer vs 30 vol developer for bleaching your hair, but do you really know what each of these terms mean? Both terms refer to the amount of developer in a bleaching mixture. Essentially, the higher the developer, the stronger the bleaching agent will be. Hence, 20 volume developer is better for lightening hair than 30 volume developer. However, you should consider the following things before choosing a developer for your hair:


When using hair bleach, it is imperative to choose the right one. The developer should be of good quality. You can use 20 Vol for lightening hair to one or two levels, while a 30 Vol developer is more suitable for highlighting hair. It is advisable to mix two parts developer with one part bleach in a non-metallic bowl. If you notice any orange tint in your hair, this indicates you are not using enough developer.