LA RECHERCHE AVANCEE L'OREAL AND KERASTASE
TAKE DAMAGED HAIR ANALYSIS ONE STEP FURTHER
AND INVENT THE CONCEPT OF EROSION SCALE.

Erosion Level 1

Surface protection deterioration

Loss of shine, rough touch.

Erosion Level 2

Cuticular abrasion

Damaged hair, loss of softness ans suppleness

Erosion Level 3

Peri-cortical damage

Damaged and rough hair, Breakage, occurrence of split ends

Erosion Level 4

Deep cortical damage

Extremely damaged and dull hair, Breakage of the fibre (snaps) and split ends