1) What is the correct pH level for hair to be healthy? a) 2 b) 7.5 c) 12 d) 4.5 - 5.5 2) If the pH level is 2, what will happen to the hair? a) Strong, hard and smooth b) Brittle and snap easily c) The cuticles will be left open so moisture can escape 3) What protein produces brown and black hair? a) Pheomelanin b) Medulla c) Eumelonin d) Cortex 4) What creates grey hair? a) The cuticles b) Lack of eumelanin and pheomelanin c) Stress 5) Where in the hair shaft is the colour pigment? a) Cortex b) Medulla c) Cuticle 6) What part of the hair shaft protects the inner hair from the damaging effects of chemicals and pollution? a) medulla b) Cortex c) Cuticle 7) What bonds does water break down? a) hydrogen b) disulfide c) salt 8) What breaks disulfide bonds, making them a permanent shape? a) Water b) Heat and cold c) Chemical: perm lotion

Poster Science in Hairdressing

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