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Traditional printing features
1. Photoresist relief printing
Low cost, but in terms of printing quality, regardless of color, or level of detail, are not as good as the other several printing methods, can only be used to print some simple patterns of the line design, will not become the mainstream of future label printing.
2. Flexo printing
(1) The loss of high-light level is serious, and the highly elastic printing plate causes serious dot enlargement, which causes the printing plate to be easily deformed during printing, resulting in the imprint of the printed product and restricting the development of the flexographic printing technology.
(2) The number of screens for pattern screens is not high. The number of mature screens is limited to 133 lines per inch. The detail level of patterns is not as good as that of offset and gravure.
3. Gravure printing
Although gravure prints are brightly colored, the biggest drawback is that the letters and patterns have jagged edges that affect the detail level of the highlights of the prints, especially small texts, which are not clear enough. For high-grade labels, gravure printing has certain limitations; in addition, the ink used for gravure printing has great pollution to the environment. In some countries in Europe and America, gravure printing has been restricted, so in the future label printing industry, gravure will not There is too much to do.
4. screen printing
Although the screen printing ink has a bright color and a good three-dimensional effect, its registration accuracy is poor, and it is only suitable for printing a single color product.
The advantages and disadvantages of waterless offset printing
1. Advantages of waterless offset printing
(1) High screen number
The waterless offset printing plate structure is similar to the gravure printing plate, and the graphic part of the ink is concaved, which reduces the probability of ink spreading under the effect of printing pressure, greatly reduces the dot enlargement rate, and greatly improves the number of product screen lines. . At present, the number of screens for waterless offset printing products can reach 300 lines/inch or even higher; while for other printing methods, it does not exceed 200 lines/inch at present. The waterless offset printing products have rich image detail levels, which are in line with the image texture of the labels. Claim.
(2) Colorful
Waterless offset printing products have a bright ink color, a wide color gamut, and the ink color of the product is always stable, meeting the high requirements of the label in terms of color. Because there is no water involved in the printing process, ink emulsification does not occur, nor does it cause the color saturation to decrease or the ink color to change.
(3) High production efficiency
High production efficiency, less preparation time before printing, saving labor, and reducing paper waste. Because there is no participation of water, the time for ink coloring and color registration in the printing process is greatly reduced.
(4) Conducive to environmental protection
Since waterless offset printing does not involve water, there is no need for various chemical additives in the conventional offset printing fountain solution, such as ethanol, isopropyl alcohol and other substances that are polluted by the environment.
Talk about Application of Waterless Offset Printing in Label Printing
In the future, waterless offset printing will become the mainstream method of label printing together with flexo printing. There are two reasons: people are increasingly demanding the quality of label printing; waterless offset printing has made great progress in technology, equipment, materials, and processes. More and more attention has been paid by people in the industry.