The operator can put the paper to be rubbing under the sulfuric acid paper and trace it again along the painting on the sulfuric acid paper, thus leaving an impression on the paper below and processing it. You can put a copy paper between two sheets of paper and trace it again, so that it can be printed directly on the paper below, but the consequence of this is that the rubbing paper will cover the blue mark of the copy paper, but the operator can cover it with gouache.

Extended data:

Manufacture and application of sulfuric acid paper;

Fine plant fibers are interwoven with each other, and paper is made in a wet state by free beating, no sizing and no filler, soaked in 72% concentrated sulfuric acid for 2 ~ 3s, washed with clean water, treated with glycerol, and dried to form a hard film-like substance. Sulfuric acid paper is solid, dense and slightly transparent.

Mainly used in printing and plate-making industries, it has the characteristics of pure paper, high strength, good transparency, no deformation, sun resistance, high temperature resistance and aging resistance. , and widely used in manual drawing, pen/ink jet CAD plotter, engineering xerography, laser printing, art printing, document recording and so on.