Waterless offset printing using the print on coated with silicon coating is not printing area, remove the ink balance control, also eliminated using water as medium. On the printing quality of it, don't use water to make the waterless offset printing,printing dot more sharp and better performance. It have some difference from the HeidelBerg Parts printing machine,just read the following article and you will get the reason.
Waterless offset printing has the ability to achieve higher line number and the contrast.
From the point of printing and persistence, wet offset printing than waterless offset printing to be more compatible. Water can be regarded as cleaning plate, ink road, a bit like a self cleaning function when printing. Without water print, dust, paper scraps can damage the waterless offset printing silicon coating, makes the choice of substrates and the work environment clean requirement is more strict.
In general, waterless offset printing need higher requirements of the printing machine maintenance and operator skills. Is slightly on the process error, printing quality may also have changed a lot. Ink temperature problem, although after years of technology development, the waterless offset printing is still a very complicated process. Perfect control every process requirement, can only to high printing quality.
When printing speed is higher than 150 meters per minute, wet offset printing need cooling roller, cooling the accumulation of heat in the printing group, it may affect the performance of the ink and ink density.
Waterless offset printing in any print speed requires cooling roll cooling ink road, and in the center of the version of the roll cooling plate, because the temperature of the ink to control the printing quality is very sensitive. Printing inks temperature limits for work in a very narrow range, only 3 ~ 4 ℃. According to different suppliers, the higher or lower than the temperature, the ink will become unstable so that the print quality is affected. In order to better control the printing effect, the factory need to air conditioning temperature control.
From the point of consumables, waterless offset printing plate only a supplier, not the ink supplier. Wet offset printing consumables suppliers, actually is plenty. For material cost, because the waterless offset printing in the industry is not much, so the cost of consumables obviously high humidity ratio of offset printing. In some cases, ink and plate price is 3 times higher.
Waterless offset printing claimed that because do not need to deal with ink balance, thus can reduce the waste. Modern wet offset printing can be carried out, on the other hand, automatic adjust the ink and water treatment, also makes the ink balance control more accurate and faster reaction, also enough to waterless offset printing. In fact, process control to the ink, wet around large extent offset and waterless offset printing performance.
Waterless offset printing because of the lack of water in a short turnaround time printing, can achieve good printing effect, the premise is, such as temperature and clean conditions, must have basic parameter has been set correctly.