Comparison between the best wet offset printing an

2022-09-30
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Comparison between wet offset printing and waterless offset printing

wet offset printing is the most common printing process in today's printing industry. The basic principle is to use the water ink balance between the printing area (printing ink) and the non printing area (water) on the printing plate. The key is to keep the ink balance stable and controlled

waterless offset printing uses a non printing area coated with silicon on the printing plate, which eliminates the control of ink balance and avoids the use of water as the medium

in terms of printing quality, printing without water makes the printing point of waterless offset printing sharper and better performance. Waterless offset printing has the ability to achieve higher line number and contrast

from the perspective of printing durability, wet offset printing is more compatible than anhydrous offset printing. Water can be regarded as cleaning the printing plate and ink path, which is a bit like the function of self-cleaning during printing

in the waterless printing plate, dust and paper scraps will damage the silicon coating of waterless offset printing, making the selection of substrate and the cleaning requirements of working environment more stringent

generally speaking, waterless offset printing requires more demanding machine maintenance and operator skills. Even if the timing of some minor experiments on the process is wrong, the printing quality may also change greatly. The problem of printing ink temperature, although after years of technological development, waterless offset printing is still a very complex process. Every process requires perfect control in order to achieve high printing quality

when the printing speed is higher than 150 meters per minute, wet offset printing requires a cooling roller to cool the heat accumulated in the printing group, which may affect the performance of the ink and the density of the ink

water free offset printing requires cooling rollers to cool the ink path at any printing speed, as well as cooling the printing plate in the center of the plate roller, because the temperature of the printing ink is extremely sensitive to the control of printing quality. The working temperature of printing ink is limited to a very narrow range, only 3~4 ℃. Depending on the supplier, above or below this temperature, the printing ink will become unstable, which will affect the printing quality. In order to achieve better control of printing effect, air conditioning and temperature control are required in the factory

from the perspective of consumables, there is only one supplier of waterless offset printing plates, and there are not many printing ink suppliers. In fact, there are countless suppliers of wet offset printing consumables. As for the cost of consumables, since there is not much in the industry to vigorously promote environmentally friendly bag water offset printing since 2017, the cost of consumables is significantly higher than that of wet offset printing. In some cases, the price of inks and plates can be 3 times higher

waterless offset printing claims that since it does not need to deal with ink balance, it can reduce the waste products in the contact area of the machine. On the other hand, modern wet offset printing can automatically adjust ink feeding and water treatment, which also makes the control of ink balance more accurate and faster, and is comparable to anhydrous offset printing. In fact, controlling the ink feeding process will largely affect the performance of wet offset printing and waterless offset printing

due to the lack of water, waterless offset printing can achieve good printing effect in a very short printing turnover time, provided that the conditions such as temperature and cleaning must be met, and the basic parameters have been set correctly

for unknown substrate, wet Z - perimeter length of corrugated box (CM); Offset printing still needs more time and produces more waste products. When repeating the same printing on a known substrate, the advanced offset printing unit can store the existing ink parameters and repeat printing. Its preparation time is short, which is similar to that of waterless offset printing

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