Chemical Engineering - Chemical Process - Discussion

Drying oils, like linseed, tung, and poppy seed oil, are the go-to choice for oil-based paints because of a crucial chemical property: they harden through a process called oxidative polymerisation.

When exposed to air, the unsaturated fatty acids in these oils absorb oxygen and form a tough, solid, and durable film.

All the oil except drying oil has vaporising capacity less, due to that rate of drying is slow, For paints inherent characteristics require is drying.

Oil paint is a type of slow-drying paint that consists of particles of pigment suspended in a drying oil, commonly linseed oil.