Ground (art) in the context of "Panel painting"

In visual arts, the support is the solid surface on which the work is painted, typically a canvas or a panel. Support is technically distinct from the overlaying ground. Sometimes "ground" is used in a broad sense of "support" to designate any surface used for painting, for example, paper for watercolor or plaster for fresco.

The support for an oil painting can be either rigid or flexible, both providing certain opportunities and challenges for the artist. In order to get both the stability and the desired texture, painters for finished paintings usually use canvas that are pre-stretched on a solid frame or panel (so-called stretchers usually made of stretcher bars). These stretched canvas became popular in Venice in the 17th century. Since these supports are expensive, studies are frequently executed on pieces of canvas or paper. Canvas board, a piece of canvas mounted onto a paper board, provides another low-cost alternative for sketches.

In art, an underpainting is an initial layer of paint applied to a ground, which serves as a base for subsequent layers of paint. Underpaintings are often monochromatic and help to define color values for later painting. Underpainting gets its name because it is painting that is intended to be painted over (see overpainting) in a system of working in layers.

There are several different types of underpainting, such as veneda, verdaccio, morellone, imprimatura and grisaille. The different types have different colourings. Grisaille is plain grey. Verdaccio is a grey tending towards yellow or green that brings out more luminous tones, while imprimatura uses earth tones.