During my time in the United States, I have repaired many different types of art works, mainly oil paintings. The attempt at canvas and "canvas stretch" is a basic skill that every oil painting creator needs to have. For a restorer, the restoration process can be perfect and close to the original after understanding the technology of each material. Restoring oil paintings is no exception. When repairing damaged areas of a painting, make sure you have a primer (Gesso) ready before starting to paint on the original stretched canvas.
An early traditional primer was telemarketing list to dilute rabbitskin glue and apply it to the canvas. After the canvas is dry, it is evenly painted with cream-yellow liquid white lead. After the white lead is dry, it is slowly sanded with fine sandpaper until the picture is smooth, and then a second layer is applied, and the second layer of sanding is repeated. Once the picture is smooth and dry, you can paint on it. Primers are readily available in art supply stores these days, and they dry off quickly after application, allowing you to start painting in no time.
Taken from Roaming Art History, courtesy of Chen Yijing Primer (Gesso) Primer, as the name suggests, is a material that is mainly applied to the "base material" before oil painting or acrylic painting to isolate the contact between the paint and the base material, so that the canvas does not come into direct contact with the paint. And can be stored for a long time. On the other hand, the primer can fill the gaps in the hemp fibers on the canvas, so the picture can be smoother when painting, and it can add a sense of richness to the color.