20vol hydrogen peroxide will generally lift the hair

20vol hydrogen peroxide will generally lift the hair

• A. 1 level
• B. 3 levels
• C. 2 levels
• D. 4 levels

Answer: (C)

Using a moderate-strength peroxide in an oxidative color system is designed to lift hair pigment by a mid-range amount. This level of developer is strong enough to break down natural pigment and allow color molecules to lighten the hair, yet not so strong that you’d see a very heavy lift under typical conditions. The actual result depends on factors like how porous the hair is, the natural level of pigment, any previous color, and processing conditions such as time and heat. Under normal use, you can expect a noticeable, moderate lightening with this strength; with longer processing or more heat, lift can increase, while shorter times or lower porosity can reduce it. The other options would require weaker or stronger conditions to reach those extremes, so a mid-range lift is the best fit for this developer strength.