Letterpress printing has a long history. Chinese type printing is one of the earliest four inventions in the world. It has promoted the creation of a long history and culture and civilization in China, and has also made positive contributions to the development of the world's printing industry.
The working principle of letterpress printing is relatively simple. Hand-engraved and print-copying printing is the earliest letterpressing process, and such prints have been inherited for nearly a thousand years. In the modern working principle of letterpress printing, the ink is first outputted by the ink feeding device and evenly distributed, and then the ink is transferred to the printing plate through the transfer roller. Since the image portion on the relief is higher than the non-image portion, the ink on the inking roller can only be transferred to the graphic portion of the printing plate, while the non-image portion has no ink. When the paper feeding mechanism transports the paper to the printing mechanism, the paper is transferred to the substrate by the combination of the printing plate device and the imprinting device, thereby completing the printing of one piece of the printed matter. Under the pressure of printing, there will be slight embossing on the back of the paper, the edges of the graphic will be neat, and the printing ink will be lighter in the center. This is the unique feature of the letterpress. The solidity of the letterpress has been given to people. Leave a good memory. After the letterpress printing was gradually replaced by offset printing, the market was extremely shrinking, and the letterpress printing equipment gradually withdrew from the market. However, after the technical innovation of printing plates, inks, anilox rolls and other parts, the letterpress printing has been renewed, especially the printing technology has the characteristics of environmental protection, simple structure, and once again promotes the reincarnation of this printing method!
The development of modern letterpress printing has moved towards the era of flexographic printing. The corrugated printing slotting machine, the predecessor of the corrugated box printing slotting die-cutting machine, is on the verge of elimination; even if the equipment of the name of the letterpress printing is still used, its printing plate, anilox roller, The transmission system has also completed the technical upgrade. The historical mission of the traditional meaning of the letterpress equipment has been completed. It is inevitable that the exit market will be withdrawn. Enterprises should recognize the direction of enterprise and technology transformation and eliminate backward production capacity and backward printing equipment as soon as possible.
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