What is a common comparison to gesso in painting?

Gesso is often compared to a base coat in painting because it serves as a preparatory layer applied to a surface before painting. Gesso is typically made from a mixture of a binding agent (such as acrylic polymer) and a filler (such as chalk or plaster), which helps to create a smooth, even surface that enhances paint adhesion and vibrancy. By applying gesso, artists ensure that the paint adheres well and that the colors appear more vivid and true to their intended hue.

In this context, a base coat functions similarly as it provides a foundation for subsequent layers of paint, priming the surface to achieve optimal results. Both gesso and base coats are essential for improving the durability and aesthetic quality of the final work, making this comparison particularly valid and insightful for understanding the role of undercoats in painting.