How to distinguish between one-component and two-component paint?

One-component paints are generally dried to a film by solvent evaporation, volatilization in the atmosphere or add dry materials to accelerate evaporation, or heating to accelerate evaporation.

Two-component paint to the A and B components of the chemical reaction and then film. Basically, epoxy is two-component.

But there are exceptions such as one-component polyester paint, the seller also gives you a two-component, the second component is a drying agent. This allows one-component paints that would otherwise require heat to cure or take a long time to cure to cure in a shorter period of time.

There is no fixed definition of a one-component, two-component paint.