What is the medium in which paint pigment is commonly suspended?

The medium in which paint pigment is commonly suspended is referred to as the binder. The binder is a crucial component in paint that holds the pigment particles together and ensures they adhere to the surface being painted. This substance enables the pigment to spread evenly and form a cohesive film once the paint dries. In various types of paint, such as oil or acrylic, different materials can act as binders, including oils or synthetic polymers.

While water, varnish, and resin may play roles in the overall paint formulation, they do not serve the primary function of suspending the pigment like the binder does. Water is typically the solvent in water-based paints, helping to dissolve and thin the paint. Varnish is a finish applied on top of painted surfaces for protection and sheen but is not part of the pigment suspension process. Resin can act as a binder in certain types of paints but is more specific to certain applications and formulations. Therefore, the binder is the most accurate and comprehensive answer in the context of paint making.