Instrumental testing
Instrumental methods are applied to test the efficacy of cosmetic products. It is a means to measure such skin paramaters as:
hydration; TEWL (transepidermal water loss) ; sebum (lubrication) ; skin pH; firmness and elasticity; colouring and pigmentation; wrinkle depth; skin smoothness; number of pores; skin redness; hair volume, texture and thickness; cellulite; sweat rate (gravimetry), which allows for evaluating anti-perspirant products.
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