What are substances like glycerine that hold products together known as?

Substances like glycerine that hold products together are known as binders. Binders serve the critical function of ensuring that various ingredients within a product remain mixed and do not separate. In the context of cosmetic formulations, a binder contributes to the consistency and stability of the product, enhancing its effectiveness and usability.

Glycerine, in particular, acts as a humectant as well, which means it helps to retain moisture in the skin while also contributing to the overall structure of a formulation. This is particularly important in creams, lotions, and other skincare products.

While fillers, solvents, and emulsifiers have their own roles within formulations, they do not serve the same primary function as binders. Fillers typically bulk up the product, solvents dissolve active ingredients, and emulsifiers help mix water and oil components. Each of these ingredients plays an essential part in cosmetics, but the specific role of holding products together and maintaining their integrity is designated to binders.