Haircolor and Lightening Flashcards

What is the function of hydrogen peroxide in a permanent haircolor formula?

Answer: It activates the dye intermediates and lifts natural melanin

Hydrogen peroxide (developer) oxidizes dye intermediates to form color molecules and simultaneously oxidizes melanin to lighten the hair.

A cosmetologist is performing a color correction on a client whose hair was previously colored too dark. Which product is best used first?

Answer: A color remover or soap cap

A color remover or soap cap is typically the first step in color correction to break down and remove artificial dark pigment before re-coloring.

The term 'single-process color' refers to:

Answer: A one-step haircolor service that lightens and deposits color simultaneously

Single-process color (permanent tint) lifts and deposits color in one application using ammonia and developer, unlike double-process services.

Which of the following is a characteristic of semi-permanent haircolor?

Answer: It coats the outside of the hair shaft and lasts 4-6 weeks

Semi-permanent color coats the cuticle and slightly penetrates the cortex without using a developer; it fades gradually over 4-6 weeks of washing.

What is the safest maximum time recommended for leaving bleach on the scalp?

Answer: 45 minutes

Most professional bleach manufacturers recommend a maximum of 45 minutes on-scalp to prevent scalp burns and excessive hair damage.

A client wants copper-red permanent color on naturally light blonde (level 9) hair. Which developer volume is most appropriate?

Answer: 10-volume

Level 9 blonde hair needs only deposit of color with minimal lift, so 10-volume developer is sufficient for maximum color saturation without unnecessary lift.

What does the term 'porosity' refer to in haircoloring?

Answer: The hair's ability to absorb and retain moisture and color

Porosity refers to how readily the hair's cuticle allows moisture and color to enter and be retained, affecting how color processes and how long it lasts.