Kuivumisöljyjen
Kuivumisöljyjen, commonly translated as drying oils, are a class of natural oils that undergo a chemical transformation upon exposure to air, hardening into a solid film. This property makes them valuable in various applications, most notably as binders in paints, varnishes, and inks. The drying process is a form of oxidation, where the unsaturated fatty acids within the oil react with atmospheric oxygen. This reaction is typically catalyzed by metal salts, known as driers, which accelerate the polymerization and cross-linking of the oil molecules.
The degree of drying is determined by the iodine value of the oil, which indicates the amount
Historically, drying oils were the primary binder in oil paints, providing both color adhesion and a protective