Flying dust method, flying dust corrosion is used to make various shades of gray surfaces. First, a flying dust box must be built, which is equipped with a hand fan, and then the polished copper plate is put into the box. There is a lot of rosin powder in the box. Turn off the fan, and rosin powder will fly in the box and slowly and evenly fall on the page. When the author thinks it is appropriate, take out the copper plate covered with rosin powder and bake it on the electric furnace. Rosin powder melts after heating, gathers into countless dots, and condenses into a film after cooling. After the copper plate with rosin film was immersed in nitric acid solution for corrosion, it was printed in gray composed of spots. The depth of gray depends on the thickness of rosin powder, film thickness and corrosion time. The author treated the flying dust method according to his own artistic conception and achieved the required effect.

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Flying dust method

A plate making method of copper plate. Make acid-resistant materials such as asphalt and rosin into powder, put it into a small cloth bag, or put it into a small copper wire screen, tap it on the top of the page to make the powder fall evenly on the page, and heat the page to make a copper plate.

Let the powder idea melt and stick to the page. Then put the plate into nitric acid solution. The place where the acid-resistant powder spots are not adhered is corroded to form pits. After removing the acid-resistant powder dots, printing with ink becomes gray with white dots on a black background. If the corrosion time is long, the gray will be dark, and vice versa. Using anti-corrosion paint to control the corrosion time of each part of the picture can get multiple levels of gray scale. Because of the thickness and density of acid-resistant powder dots on the layout, the picture changes more colorful. In addition, a special flying dust box is used to fly dust, that is, acid-resistant powder is built in a closed box, the fan is shaken to make the powder fly, and then it is put into a plate, and the powder falls evenly on the plate and is taken out according to the required thickness. This method can make the flying dust fine and uniform, but it can't arrange the density of each part according to the needs of the picture.

Try any method that is easy to understand.