Tightness and elasticity are biomechanical properties of the skin that are measured using an advanced measuring instrument, Cutometer. Cutometer is one of the most recognized and most widely used measuring instruments in dermatology for assessing skin tightness and elasticity. The instrument creates an air suction, i.e. a negative pressure, which the skin is exposed to for a short period. While the skin is exposed to the pressure changes, the instrument's optical parts measure the skin's movements. The skin's resistance to movement when exposed to suction is a measure of skin tightness. The skin's ability to restore its original shape when the suction ends is a measure of the skin's elasticity.
Method: Test subjects are instructed to stop using other face creams/serums and the like when the test period starts. The test subjects apply the test product to their face twice a day, as the only skin care product, for 8 weeks. The skin's firmness/tightness and elasticity are measured on day 0, and then after 8 weeks. Measurement of the skin's tightness/firmness and elasticity takes place at both times in a room with a temperature of 20±2oC and a humidity of 50±10%, so that the result is not affected by the surroundings. The results of the measurements before and after 8 weeks of using the test product are then compared. In the clinical study, the effect of the test product is compared in this way with the skin care the test person has used in the past.
The test is in accordance with:
Regulation of the European Parliament and of the Council (EC) No. 1223/2009 of 30
November 2009 on cosmetic products.
Cosmetics Europe – The Personal Care Association (previously COLIPA) Guidelines
"Product Test Guidelines for the Assessment of Human Skin Compatibility 1997." Cosmetics Europe – The Personal Care Association (previously COLIPA) Guidelines
for the Evaluation of the Efficacy of Cosmetic Products 2008.