Plasticiser

Ingredients with the function of a plasticizer are needed primarily not for active skin or hair care, but in order to make the formula material more flexible, elastic and less brittle. In the CosIng database of the European Commission, this function is described as the ability to reduce brittleness and increase the plasticity of synthetic materials that form a film or coating in a cosmetic product. Therefore, such substances are especially important in nail polishes, resistant coatings, film styling products for hair and some decorative formulas, where it is necessary that the layer does not crack, is better distributed and retains an even coating for longer. (single-market-economy.ec.europa.eu)

This is indirectly manifested on the skin and hair: the product lies more evenly, the film is more comfortable, tightens less and tolerates bends, friction and daily stress better. For hair, this can mean a more flexible fixation without excessive rigidity, and for nails, a more resistant and less chipping coating. In other words, such components primarily improve the texture, application and mechanical properties of the product, rather than working as independent caring assets. The general safety requirements for cosmetic ingredients in the EU are set by Regulation 1223/2009, and data on the functions of ingredients are published through CosIng. (health.ec.europa.eu)

Typical examples are Triethyl Citrate and Acetyl Tributyl Citrate: both substances are known as plasticizing agents and are used where the formula needs more flexibility and film stability. In the finished product, they help to achieve a more comfortable touch profile and a neat finish, reducing the risk of cracking of the coating after drying. (joint-research-centre.ec.europa.eu)