Binding

The binding ingredients help to combine the particles and components of the formula into a more complete and stable mass. In cosmetics, this is especially important for dry and pressed products, such as powder, eye shadow or blush, where the composition should keep its shape well, not crumble and evenly applied to the brush. In creams, gels, and lotions, such substances are also useful: they improve the coherence of the system, help distribute pigments and fillers, and make the texture more uniform and comfortable to apply. According to PubChem, a number of polymers and gums used in cosmetics are used as thickeners, stabilizers, and binding agents, meaning they help hold components together and maintain the desired rheology of the product. (pubchem.ncbi.nlm.nih.gov)

For skin and hair, such components usually act not as a separate "care" asset, but as a technological basis on which the quality of application and the external result depend. If the formula is better bound, the product lies flatter, crumbles less, does not delaminate and provides a more predictable coating. In hair products, this can mean a more even distribution of the product over the strands, and in decorative cosmetics, a better integrity of the stick, paste or pressed base. The FDA also notes that inactive ingredients are added to formulations to ensure the desired product properties, including stability and ease of use. (fda.gov)

Typical examples of such ingredients are Xanthan Gum and Cellulose Gum. Xanthan gum is known as a polysaccharide, which is widely used in cosmetics to control viscosity and stabilize water systems; it is also indicated for use as a binding agent. Cellulose derivatives, including Cellulose Gum and Methylcellulose, also help to compact and combine the formula, while improving its texture and stability. Therefore, ingredients with this function are especially appreciated where the product needs to be not only effective, but also physically comfortable, durable and accurate to use. (pubchem.ncbi.nlm.nih.gov)