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(II) of printing methods for adhesive labels
time:
2020/03/23
Source:
Guangzhou Guangcai Label Co., Ltd.
Flexo
At present, the quality of flexographic printing is no less than offset printing, and even has its own unique features. The advantages of this printing process are simple machine structure, low cost, and printing quality. It is comparable to offset printing and gravure printing, and has the advantage of thicker ink layer than offset printing products. Flexo printing uses water-based ink and uv ink, which does not pollute the environment. However, due to the large elasticity of flexo printing plate, the gradation reproducibility is different from that of intaglio printing plate and common relief plate. The dot increase from highlight to middle tone of flexo printing plate is large, the printing contrast is small, and the high gloss layer is prone to faults. In order to make up for the gradation defect, FM dot can be used for the high gloss part, dark tone or intermediate call AM screening to improve quality. Label printing plants without flexo printing machines can introduce laminated narrow-width flexo printing machines dedicated to self-adhesive label printing. This printing machine is suitable for film label printing.
because flexographic printing machines all use circular die-cutting, the die-cutting roller has high price and long production cycle, which is only suitable for long-term work. it is not suitable for the large demand for short-term work of domestic self-adhesive labels, but it is 1 easy-to-transform label printing equipment and can work online with film slitting, sewing and sealing processes.
due to the continuous improvement of self-adhesive label printing technology, the problem that the old flat die cutting machine cannot continuously feed paper has been solved. In the speed, automatic registration, post-printing on-line work and other functions, it can already be compared with the mature circular die-cutting machine. Because the die-cutting knife of the flat die-cutting machine is easy to make, the cycle is short, and the price is low, so the production cost can be greatly reduced in the short term.
Gravure
Gravure printing uses a short ink supply system to supply ink, web printing, and a high degree of automation. The use of solvent-based ink, ink layer drying quickly, is the first choice for film printing. General intaglio printing machine speed is higher, many intaglio printing machine rear end is also equipped with cylinder die cutting device, can be die cutting, creasing, suitable for all kinds of label printing, but because of the intaglio plate making cycle is long, plate making cost is expensive, only suitable for large quantities of label production.
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