14:18

Structure of Hair Review

23:00

The Chemistry of Haircolor Review

3:22

What Kind Of Scientific Knowledge Was Recorded Using The Cuneiform Writing System?

38:04

Matrix Toners 101

20:03

Colour theory & knowledge of colour correction

21:24

Understanding Lightener

1:01:44

The Color Mixing Masterclass

2:05:24

VIDAL SASSOON A