copperplate etching
Copper engraving was introduced into China during the Qianlong period. Emperor Qianlong once ordered the production of copperplate prints for generals and famous military exploits. Some of them have become treasures of major museums at home and abroad.
After the liberation of our country, the printmaking departments of various fine arts colleges mostly set up copperplate printmaking specialty. However, copperplate production needs a workshop-style venue, and most students do not have such working conditions after graduation. With the passage of time, copperplate prints gradually declined. In Shanghai, only a few painters still stick to the garden of copperplate prints. One of them is Lu Zhiping from Shanghai Oil Painting Sculpture Institute.
In 1950s, major art colleges all over the country set up printmaking departments and offered copperplate courses, which trained a group of professionals engaged in copperplate creation and teaching in China. They have created many exquisite works one after another, filling the gaps in China's art gardens. In the 1960s and 1970s, China's copperplate prints were at a low ebb, but in the early 1980s, with the reform and opening up in China, a new period of development began. In recent 20 years, exhibitions, publications and professional academic exchanges have been frequent, and China copperplate prints are deeply loved by artists at home and abroad and collected by major art galleries all over the world.
It can be predicted that with the continuous development of world art, China copperplate will keep pace with other paintings with its unique style, and China copperplate will surely win a higher reputation in the world. Copper engraving marks artistic, elegant and solemn, and has always been regarded as a precious artistic painting in the world. Masters of all ages are keen on the artistic creation of copperplate prints. From Diu Lei in Germany, Rembrandt in the Netherlands, Goya in Spain, Manet, Monet, Sislan and Degas in French impressionism, to Picasso and Matisse in modern times, all the masters have left very exquisite copperplate prints.
It is of great social and historical significance to copy and collect famous works in the form of symbols. With the continuous improvement of living standards, people's demand for art appreciation and art collection will become wider and wider, and the market for copperplate signboards will become larger and larger. The sooner you enter, the sooner you gain the initiative, and there is a "blue ocean" in front of you.
Copperprint signs The thickness of the copperplate produced by this technology is between 0.2- 1.0mm, and it is made of high-grade materials for anticorrosion, and the picture will never fade and change color, which can keep the picture as new. The picture frame is made of high-quality hardwood (such as northeast catalpa and basswood), which is cooked at high temperature and is not easy to deform and crack. The picture of the frame is made of Korean technology, and the vivid imitation of mahogany sets off the noble, luxurious and atmospheric feeling of copperplate. This technology has the characteristics of unique artistic method, fine workmanship, strong three-dimensional sense, vivid image, luxury and elegance, gorgeous color and delicate texture.
Copperprint sign products are widely used in institutions, military units, schools, hospitals, banks, insurance, securities and other financial institutions, office buildings, offices, home decoration, furnishings and so on. There are dry etching method, corrosion method and flying dust method, among which corrosion method is more common.
Flying dust method: a plate-making method of copper layout. Make acid-resistant materials such as asphalt and rosin into powder, put it in a small cloth bag, or put it in a small copper wire screen, tap it on the top of the page to make the powder fall evenly on the page, heat the page, and make the powder point 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.
Soft wax method: a plate-making method of copper plate. Grease is added to antioxidant wax (or preservative) (hard animal wax, such as butter and sheep fat, is generally suitable). ) make it soft and sticky. After the layout is painted, cover it with a layer of paper with obvious paper patterns, and then draw on the paper with a pencil or carving needle. Wherever you draw, wax will stick to the paper. If the force is too heavy, the wax will stick off more, and vice versa. After painting, uncover the paper and put it in acid to corrode. The page stuck by wax is corroded first, so the corrosion is deeper; Wax sticks to a small area, and acid can only corrode through a thin layer of wax, so it is shallow; What is not painted will not be corroded. After removing the anticorrosive wax, you can print with ink. Due to the weight of the painting pen, the color of this painting has changed. If you draw with a pencil, it will have the effect of a pencil. In addition, different patterns such as linen, silk and special paper patterns can be embossed on the soft wax to increase the artistic effect of the layout.
Dry engraving: a plate-making method of copper layout. It can be directly engraved on copper plate or zinc plate with engraving needle, and can be printed with ink without corrosion. The engraving needle needs to be a very hard steel needle or a stylus with a hard gem (or diamond) at the end. When describing the layout, the copper thorn is turned up on both sides or one side of the line, such as turning up the soil when plowing. When printing, these copper thorns are stuck with ink, which makes each line form a soft sense of infiltration. Because lines are carved on copper plates, they often have rigidity and strength, thus showing a special artistic effect different from corrosion.
Corrosion method: a plate-making method of copper layout. It is to coat the layout with anti-corrosion wax or preservative (generally made of acid-resistant materials such as yellow wax, rosin and asphalt) to form an anti-corrosion film, draw it on the layout with a carving needle, and then put it into corrosive liquid (usually nitric acid solution) for corrosion. Where the anti-corrosion film is scraped off by the engraving needle, it is corroded and forms a concave line. The longer the corrosion time, the deeper the concave line. After removing the anti-corrosion film, a plate is formed. When printing, the page is first coated with ink to make the concave lines full of ink, then the ink outside the concave lines is wiped off to make the concave lines full of ink, and then the ink outside the concave lines is wiped off and put on the offset printing machine to press the paper, and the ink inside the concave lines is adsorbed on the paper to form convex lines. Because the lines are thick, shallow and dense, the ink outside the lines is erased, forming a multi-level and tonal picture.