Although the waterless offset printing technology in constant development, but its development speed is far from expected so fast, the main reason is that some of the key technology hasn't been solved yet, such as plate, printing ink, temperature control, etc.
1. The plate is printing plate production, the main consumables, a direct impact on the cost of production. Plate is the core of the waterless offset printing, waterless offset printing plate is different from the PS version, its surface similar to the gravure, ink lipophilic image reproducibility is good, bright colors, print quality is good wait for an advantage, but the difficulty in processing, and the resistant force subject to the operating environment.
2. Waterless offset printing ink waterless offset printing and offset printing ink used in the water on the choice of pigment is of no difference. They are the main difference is that the ink used in the resin that is connecting part. Because of the characteristic of the waterless offset printing, it is water compared to offset printing ink used in printing ink and has the following some special properties.
(1) there needs to be higher than water offset printing ink viscosity and viscosity, is it possible to provide such large ink cohesion in is greater than the forces between ink and silicone rubber layer, can make the silicone rubber layer is characterized by thin oil, make it play the role of the water the water in the offset printing.
(2) the need to adapt to the rheological properties of waterless offset printing special. Because the waterless offset printing ink with high viscosity, so it is in the ink flow between roller and plate will become more difficult, which requires the ink has good rheological properties.
(3) owing to the special influence of temperature in the waterless offset printing, so the waterless offset printing ink is best optimum printing has a relatively wide temperature range.
3. The temperature control system of waterless offset waterless offset printing system is another important part of the temperature control system of it, this is it offset printing and there is water on the mechanical structure of one of the most significant difference between the two. Where there is water in the offset printing, in addition to the balance of ink, education version fluid is another important role is can take away due to the plate, friction and the heat generated by the high-speed rotating plate can remain in a relatively stable, fit within the temperature range of ink transfer.
Due to don't use the water in the waterless offset printing, so you need to use a temperature control system to maintain a suitable temperature range of ink transfer. Waterless offset printing heat mainly from two aspects: one is the plate cylinder and rubber roller and embossing roller friction between role; 2 it is because of the characteristic of the high waterless offset printing ink viscosity, and between the ink roller and ink roller in the process of ink transfer due to friction generates heat. This heat if not promptly eliminate, will make plate, ink roller temperature rise sharply, and greatly change the rheological properties of ink and viscosity, lead to unstable situation, and thus unable to complete the normal transfer ink.
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