BKK Hair Color

Which is the type of hair color that can spreads into cortex?

• Temporary hair color

• Semi-permanent hair color

• Permanent hair color

• None

Which of the followings is incorrect?

• Oxidation dyes are used as permanent hair colors.

• Semi-permanent hair dyes can penetrate into cortex layer.

• Acid dyes are temporary hair dyes.

• Temporary dyes work by cohesion and adhesion forces coating on epicuticle layer.

Which of the following is not a dye precursor?

• Aminophenols

• Diamines

• Aromatic amino nitroantroquinones

• Aminobenzoic acids

Which ingredient is necessary in a permanent hair color product?

• pH adjuster

• Antioxidant

• Emulsifier

• All

Which of the followings is used to prevent over-oxidation in hair caused by metal in water?

• EDDS

• EDTA

• DTPA

• All