Are there special requirements for using UV inks? Uninformed laymen, even some newcomers to the industry, will be confused because of the characteristics of UV ink, so we will need to pay special attention to some places when using it. Next, listen to the special requirements of UV ink manufacturers to use UV ink.
Requirements for printing equipment: At present, many printing companies implement UV printing by installing a UV curing device on an ordinary offset press, but there are many problems with this equipment modification method. For example, the strong corrosion of UV ink may cause ordinary rubber rollers, The rubber blanket swells, which affects the stability of the printing pressure. In severe cases, it may even cause peeling or surface cracking of the rubber roller. Therefore, UV ink printing has extremely high requirements on rubber rollers and blankets, and generally requires the use of special rubber rollers and blankets for UV printing.
Ordinary gripper teeth will be deformed by heating under ultraviolet light, which will affect the accuracy of overprinting. Therefore, the gripper on the printing unit must be replaced with a gripper exclusively for UV printing.
The UV ink has high viscosity and strong corrosion, which not only easily cracks and damages the ordinary ink fountain film, causing UV ink to flow into the ink tooth transmission mechanism, causing the ink tooth drive motor to malfunction due to excessive resistance, and the rubber roller adjustment mechanism and ink roller swing The institutions are also easily damaged. The operator is required to strengthen the daily maintenance work of the printing equipment, clean it thoroughly, and use qualified accessories and raw material consumables.
Requirements for storage conditions: The above-mentioned UV ink curing issues, printing stability, etc. all require an important premise, that is, good ink storage conditions. The best storage temperature of UV ink should be controlled at 20 ～ 25 ℃, avoid sunlight, the best relative humidity should be controlled at 55% ～ 65%, sealed storage, avoid dust mixed, and the UV ink storage warehouse should be able to maintain a constant temperature Constant humidity. At the same time, it should also be noted that the UV ink storage warehouse should be away from fire and heat sources to prevent accidents.
The storage and use management of UV ink should also follow the principle of "first in first out", that is, the UV ink purchased first should be used first to prevent the UV ink from affecting the quality of its use due to the long storage time. The UV ink remaining after printing must be sealed and stored in a dark place. UV ink should not be stored for a long time. It should be used before its shelf life. The maximum storage period should not exceed one year. Otherwise, once the UV ink deteriorates, it will not only affect the printing quality, but even cause printing failures in severe cases.
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