Final answer:
The three essential ingredients in spray tan solution are polymers, which provide hold, solvents that carry the polymers, and an additional component such as a conditioner or propellant.
Step-by-step explanation:
The three ingredients that make up our spray tan solution include the following: polymers, solvents, and a third ingredient typically used for skin conditioning or as a propellant.
The polymers are crucial as they hold the hair in place, giving it stiffness and firmness without causing breakage. The solvents are responsible for dissolving these polymers and carrying them in the spray tan solution so that they can be evenly applied to the hair.
While polymers and solvents are the primary ingredients, additional ingredients such as conditioning agents or propellants are also commonly found in spray tan solutions to improve application and hair feel.