Oil painting mural

It's best to introduce you with gypsum foundation:

Leather gypsum foundation was produced in the Middle Ages and is the best foundation for hard supporting materials (boards, etc.). ). Gypsum has strong adhesion and is compatible with most color matching media. Besides propylene, it is especially suitable for oil painting pigments, because it is a completely oil-free base material. Rubens uses colored plaster soles. The disadvantage is that the color layer is brittle, so the bottom of the board is the best.

At the end of the Middle Ages, that is, at the beginning of oil painting, most easel paintings were painted on wooden boards, and gypsum was used as the foundation. Gypsum base contains no oil, is not easy to turn yellow, and can keep pure white. Therefore, the classical transparent oil paintings from14th century to15th century still shine like gems.

The traditional manufacturing method of gypsum foundation is as follows:

(1) basic materials. Animal hide glue or water glue 70-100g, water1l. Apply it two or three times. You must wait until the first layer of glue is completely dry before applying the following layers.

(2) Primer. Glue solution, zinc white and gypsum each 1 serving.

Wood board was the main painting material chosen by ancient European masters before oil painting on canvas appeared. Choose pine, Chinese fir, cypress, basswood, poplar, etc. Some painters use plywood (plywood or plywood), nail the plywood (plywood) to the wooden frame, mix latex with a small amount of water and lithopone or white powder into a semi-fluid, scrape the latex onto the board with a scraper, dry it, gently polish it with sandpaper, and then brush a layer of latex water. Plywood can also be used as rubber soles. In order to increase the adhesion of plywood to color, it is a better way to stick a layer of thin linen (cotton cloth is also acceptable) on the board before making the foundation. First, soak the cloth in latex water, and at the same time, Bo Tu a layer of glue on the board surface. Then, lay the soaked cloth flat on the board surface and brush it flat with a brush. Plywood must be fixed on the wooden frame first, otherwise it will be deformed. If the frame is small, the plywood area is not large, and the wooden frame is not nailed, glue can be brushed at the same time.