What type of solvents are considered the least expensive of all solvent classes?

Aliphatic hydrocarbons are recognized as the least expensive solvent class primarily due to their widespread availability and production methods. These solvents are derived from crude oil refining processes and are abundant, which keeps production costs low. Common examples include mineral spirits and paint thinner, which are used extensively in various applications, including painting and cleaning.

The price advantages can be attributed to several factors, including the large-scale production capacity and the relatively straightforward refinement process. Aliphatic hydrocarbons are also known for their effectiveness as solvents, which further contributes to their popularity and demand in the market.

While other classes of solvents may have specialized applications or properties that may justify a higher cost, aliphatic hydrocarbons maintain a position as an economical choice for many contractors due to their versatility and efficiency in formulation.