Hydroxide relaxers that do not require the application of a protective base are known as?

• A. No-base relaxers
• B. Base relaxers
• C. Acid-base relaxers
• D. Neutral-base relaxers

Answer: (A)

Hydroxide relaxers work by breaking disulfide bonds in the hair, and because they’re highly alkaline, a protective base is usually applied to the scalp to prevent irritation or burns. Some formulations are made to be used without that base layer; these are called no-base relaxers. They’re designed to be applied directly to the hair and scalp without the base step, offering a quicker, more convenient process while still delivering the relaxer effect when used as directed. The other terms refer to different concepts (base-required relaxers or other chemical approaches) that don’t describe the no-base, scalp-base-free category.