Printing shop FAQ
It is well known that there are many factors that affect quality in the printing process, in addition to the machine itself, as well as substrates, inks, and external factors such as air humidity, shop temperature, and the like. However, when a print operator encounters a practical problem in production, it is often not easy to quickly find the source of the problem and effectively solve the problem.
Printing operators often encounter the problem that the substrates (paper) stick together due to static electricity on the surface, causing two or more sheets to be simultaneously sucked up by the flying nozzles, causing the feeder to pause. Static electricity is produced by insufficient electrons (positive charge) or excessive electrons (negative charge) on the surface of the substrate. During the processing and transportation of paper, due to the dry environment, the paper has a low water content and static electricity is easily generated. In principle, an environment with a relative humidity of 40-42% is more suitable for paper storage.
Solution:
1. The water content of the paper should be controlled between 45-55%, so that the static electricity weakens as the water content increases until it disappears.
2. It is best to install air conditioning in the printing workshop, and the relative humidity should be controlled at 50-55%. It is worth noting that in the cold season, in the heating plant, the air humidity will drop due to the heating of the air conditioner.
3. Anti-static equipment such as static bars and static blowing can effectively weaken the power of static electricity; humidification equipment can increase the conductivity of air, thus preventing electrons from collecting on paper.