Cosmetic preparations made by dissolving a solid, liquid, or gas into another substance are called?

Cosmetic preparations made by dissolving a solid, liquid, or gas into another substance are referred to as solutions. In a solution, the solute (the substance being dissolved) is evenly distributed within the solvent (the substance in which the solute is dissolved). This results in a homogeneous mixture where the individual components cannot be distinguished from one another.

Solutions are characterized by the fact that they do not have visible particles and maintain clarity, distinguishing them from suspensions, which contain larger particles that can settle over time, and emulsions, which are mixtures of two immiscible liquids that can appear cloudy due to the dispersed droplets. Gels are semi-solid systems where a liquid is suspended within a network of polymer chains but do not involve the same kind of complete dissolution seen in solutions. Thus, solutions are the appropriate term for these types of cosmetic preparations.