Bump process
The concave-convex process is to form a three-dimensional effect on the surface of the paper above or below the plane of the paper through the pre-made engraving model and the effect of pressure. Bump printing is also called embossing process, in which the process of applying pressure from the back of the paper to swell the surface is commonly known as "bumping"; and applying pressure from the front of the paper to make the surface concave is called "embossing", which is a printed product The common technology in the surface subsequent processing technology is mainly to emphasize a certain part of the overall design to highlight its important position.
In this process, a set of concave-convex printing plates (male and female molds) must be produced according to the designed graphics. Using the greater pressure of the relief printing machine, the three-dimensional space is rolled out in the printed partial graphics or in the blank space. The graphics make the printed product have a three-dimensional effect, and the entire structure also has rich layers, adding more and stronger artistry.
The concave-convex embossing process is an environmentally friendly process, and its production process does not have any pollution. The market is very widely used, ranging from high-end fashion products to business cards, and the bump process has become one of the most common process technologies in the printing and packaging and graphic design industries.
Common printed materials are: cover of exquisite books and periodicals, gift packaging, advertising leaflets, posters, handbags, cosmetic boxes, envelopes and letterhead, children's calligraphy and reading materials, etc.
The concave and convex embossing is also widely used in paper surface processing. Many manufacturers at home and abroad produce professional machines for paper processing. The lines are diverse and have a very special artistic effect.
The printing plate produced in the early process of printing and processing bumps has a flat surface, and there is rarely a process similar to relief. Because there is no cooperation of computer three-dimensional technology and laser engraving technology, manual relief production not only takes a lot of time, but the quality is not guaranteed. Relief bumping came into the market with the emergence of laser engraving technology. Due to the three-dimensional visual effect, the visual effect of printed products has been improved. Before using the embossing process, the thickness and toughness of the paper must be considered first. This is because the deepest and shallowest parts of the embossing process need to have a certain drop in order to express the three-dimensional relief effect. Therefore, the paper weight generally requires more than 220g / m2 , The higher the toughness, the better.
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