As a hair care expert with extensive knowledge in the field of hair coloring, I would like to address the question about using a 40 volume developer with bleach and the concept of a "hi-lift" color.

Firstly, it's important to understand what a 40 volume developer is. The term "volume" refers to the concentration of hydrogen peroxide in the developer. A 40 volume developer contains 40% hydrogen peroxide, which is a strong oxidizing agent. This high concentration is typically used for significant hair color changes, such as lightening dark hair to a much lighter shade or for color removal processes.

Now, let's discuss the use of bleach with a 40 volume developer. Bleach is a powerful chemical that can lift hair color up to 9 levels. However, it is not typically mixed with a 40 volume developer unless you are attempting to achieve a very light blonde shade on hair that is already pre-lightened. Using bleach with a high volume developer can be risky because it can cause severe damage to the hair, including breakage and a dry, straw-like texture. It is essential to perform a strand test before proceeding with any bleach application to ensure the desired result without compromising the hair's integrity.

On the other hand, a "hi-lift" color is a specific type of hair color that is designed to lift the hair up to 6 levels. It is a high-lift color, which means it has the ability to lighten the hair significantly. However, a hi-lift color is typically used on "virgin hair," which is hair that has not been previously colored or chemically treated. The reason for this is that the hair cuticle is still intact and can handle the lifting process without the risk of damage that comes with multiple chemical treatments.

When using a 40 volume developer with a hi-lift color, it is crucial to follow the manufacturer's instructions carefully. The developer's high concentration of hydrogen peroxide can still cause damage if not used properly. It is also important to consider the hair's current condition and the desired outcome. If the hair is already damaged or if the desired color is not too far from the natural shade, a lower volume developer might be a safer choice.

In conclusion, while it is possible to use a 40 volume developer with bleach in rare cases, it should be done with extreme caution and only by a professional who is well-versed in hair chemistry. As for hi-lift colors, they can be a great option for lightening virgin hair up to 6 levels when used with a 40 volume developer. However, it is always best to consult with a professional hairstylist to determine the most appropriate course of action for your specific hair type and desired color outcome.

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You would use 40 volume developer with either bleach (in rare cases) and you would also use 40 volume developer with a color that is called a "hi-lift". A hi-lift is a color that will color and tone the hair up to 6 levels, but can only be used on virgin hair.read more >>