Which of the following should a pigment NOT be combined with for fluid painting?

A pigment should not be combined with a fresco medium for fluid painting due to the inherent properties of fresco as a painting technique. Fresco involves applying water-based pigments onto wet plaster, which causes the pigments to bond with the plaster as it dries. This method is quite different from the fluid painting techniques that utilize other media, such as acrylic or oils, where pigments are suspended in a medium allowing for greater manipulation, blending, and layering.

In contrast, combining pigments with acrylic medium, oil, or a watercolor binder is standard practice. Acrylic medium permits fluidity and enhances the versatility of acrylic paints, while oil allows for smooth blending and rich textures. A watercolor binder is essential for watercolor painting, enabling pigments to dissolve and distribute in water while maintaining fluidity. Thus, the combination of pigment with a fresco medium is fundamentally incompatible with the nature of fluid painting as it restricts the flexibility and application methods that other mediums provide.