Cosmetic tests generally include physical, chemical and microbiological tests. There is a chemical in the formula of all cosmetic products and chemical tests, anionic active substance determination, cationic active substance determination, nonionic active substance determination, total active substance determination, salt determination, inorganic salt determination, fluoride determination, heavy metal determination, oil content and determination of water content.

Physical tests of cosmetic products generally focus on: pH determination, density determination, viscosity determination, dry matter determination. Physical tests are based more on the physical properties of the cosmetic product, such as appearance, density, smell and color.

Suitable preservatives incorporated in cosmetic products should be colorless and do not give odor or taste to the cosmetic product contained therein. Also should not be volatile. Preservatives should not lose their effectiveness even if they remain under high temperatures during the production and use of cosmetic products. In addition, preservatives should remain effective in the cosmetic product and be compatible with other chemicals contained in the formulas.

The pH of cosmetic products is a measure of the acidic or alkali (base) value of this product. pH means potential hydrogen and in cosmetic products this value indicates the amount of hydrogen in the product.

The preservatives added to the cosmetic products must be resistant to the high temperatures they encounter during production and use. Temperature resistance tests are performed in creams and other liquid and semi-solid cosmetic products and analyzed how resistant the product is to temperature changes.

Mostly, mechanical tests are carried out to determine the condition of the cosmetic products in the form of granules and powder during transport and storage.

 

In order for these physical examinations carried out by authorized laboratories to be valid and acceptable, the laboratories must be accredited from one of the national or international accreditation bodies in accordance with the TS EN ISO / IEC 17025 General Requirements for the Qualification of Testing and Calibration Laboratories.