What level of hydrogen peroxide developer is most commonly used with permanent hair color to lift and deposit color simultaneously?

20-volume (6%) developer is most commonly used to lift 1–2 levels while depositing color.

What is the term for the process of lightening previously colored hair back to its natural base level?

Color correction or color removal is the process of removing artificial pigment to return hair to its natural level.

Which type of hair color deposits pigment only on the outer cuticle layer and fades with each shampoo?

Temporary hair color coats only the cuticle and is removed with a single shampoo.

What is the primary active ingredient in most powder and cream hair lighteners?

Persulfate salts (ammonium, potassium, or sodium persulfate) are the primary active ingredients in hair lighteners, accelerating the decolorization process.

What does the term 'contributing pigment' refer to when lifting natural hair color?

Contributing pigment (also called underlying or remaining pigment) is the warm tone revealed in hair as its natural melanin is lightened during a color service.

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Chemical Services – NY Cosmetology State Board Exam

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