At present, most of the large-scale adhesive label printing is based on letterpress and flexographic printing, but the demand for personalized small-batch adhesive labels on the market is increasing. Tens of thousands of small labels are combined into six. The open and eight open sheets of paper are only a few thousand copies and a few hundred copies, and the web label printer seems to be at a loss when printing such jobs.
In terms of printed products, small batch jobs require low cost and short delivery time; and product quality often requires bright colors, and most of the layered layouts are composed of dots. According to this situation, many small printing companies have adopted six-color monochromatic offset presses for four-color overprinting, and have achieved very good results. Taken together, it has the following advantages.
1. Reduce printing costs
In offset printing, relief printing, gravure printing and other printing, offset printing is undoubtedly the lowest cost printing method. In the pre-press process, compared with the complex plate-making process of the flexographic version, the production, production and printing of the PS plate are familiar to the printing house. From a technical point of view, all printing plants have turned to offset printing after eliminating lead printing, so there is no additional burden.
If a roll-fed adhesive printing machine is used, there will be a loss of more than ten meters of paper when the machine is turned on. If the overprint adjustment is not good, and the paper line of the unit-type printing machine is longer, the waste is greater. The offset press can use other paper to make version paper, saving self-adhesive materials.
Compared with relief printing and flexographic printing plates, offset printing plates are cheaper and do not require much auxiliary materials. When printing paper of different thicknesses, the printing pressure can be adjusted at will. In terms of operation, offset printing technicians (leaders) are also easy to hire, and the technical threshold is not high.
The practice of the printing factory has proved that the cost of printing small adhesive labels with an offset printing machine can be reduced to "cents". If it is processed by incoming materials, even if the profit is calculated in "cent" and "cent", there is profit.
2. Guarantee printing quality
Different from the stickers in Japan and other countries, the stickers in China are mostly based on rich layers of graphic work, especially in small batches, which often require colorful colors. Offset printing has advantages in dot printing, and on-site printing is not inferior. If you need to increase the thickness of the ink, you can use the advantage of accurate overprinting for secondary printing. Because it is a small batch printing, time can be guaranteed.
In addition, adopting quick-drying ink for offset printing, adding desiccant to the ink, and spraying powder after printing can also effectively solve the problem of staining of printed products and improve printing speed. [next]
3. Shorten the printing cycle
Short-run work printing emphasizes timeliness. If the early plate-making process is complicated and the plate-making cycle is long, it will inevitably affect the delivery period. The offset platemaking cycle is short, which is a suitable choice for short-form live label printing with complex patterns and strong timeliness.
Of course, there are certain difficulties in printing self-adhesive materials with an offset press. There are two main points:
1) In the market, self-adhesive materials are currently sold on rolls, and printed on sheet-fed offset presses, which must be cut into flat sheets. If the printing factory makes changes by itself, it takes time and effort. In this regard, it is necessary to ask the sticker material supplier for assistance. In addition, the self-adhesive paper that has just been cut is curled and needs to be flattened. After flattening for a long time, it needs to be photographed before printing.
2) Offset printing machine does not have a die-cutting unit. The printed self-adhesive sheets are not finished products. You must use a die-cutting machine for post-press processing and die-cutting, such as elliptical, triangular or other special-shaped label products. It takes an extra process Working hours.
There are many successful cases for printing small batch of self-adhesive labels using six-open monochrome machine. For example, a factory in Cangnan, Wenzhou, adopts a Weihai Bintian WH47 six-open single-color machine, and one class can print 3 to 4 batches of about 1,000 sheets of four-color stickers. Calculated at a processing fee of 60 yuan per color (minimum wage), the profit per shift is equal to 3 batches / day × 60 yuan / color × 4 = 720 yuan / day. If the living source is sufficient, the monthly gross profit can reach more than 20,000 yuan.
However, based on my experience, I suggest that printing equipment should be used only after selecting the appropriate equipment to print the corresponding products.
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