V. Application
1. Zhejiang Starlight Slide Factory. Huaguang YP-U UV ink. The PS plate was made into a printing plate, and a PET slide was printed on it. It was printed with 50,000 printings. The printing plate was still in good condition, and the YP-II conventional PS plate could only print about 5,000 printings.
2. Unicom Sam Po Lin Printing Co., Ltd. Huaguang YP-U type UV ink PS plate made of printing plate, with Shanghai Youwei brand UV ink, Heidelberg CDl02 six-color UV ink special printing machine, substrate is 250gPET coated alumina paper, printing high-grade cigarette packaging box. Several editions are shown in the following table:
3. Zhejiang Xinde Printing Industry Co., Ltd. The factory used Huaguang YP-U type UV ink PS version made on the printing machine printing, printing up to 30,000 India, printing times than the regular PS version has greatly improved.
There are also several printers in Qingdao, Jiangsu and other places also try Huaguang YP-U type PS version, the effect is not bad.
Six, with Huaguang YP-U UV ink PS version should pay attention to several aspects
The PS version of Huaguang YP-U type UV ink has been compared with similar foreign products and conventional PS version. After several domestic users actually use the machine, the performance is close to the international similar products, and some indicators are better than Fuji. VPU version, such as in the application of weak display, of course, to use Huaguang YP-U type UV ink PS version, but also strictly in accordance with the recommended conditions of use to do so in order to use Huaguang YP-U type PS version, Make a good machine plate.
1. UV ink PS version slightly lower sensitivity than the regular PS version, corresponding increase in the amount of exposure in the print. For example, with 4 kW iodine lamp, exposure 100 units, with Huaguang PD type developer, 1:6 development for 60 seconds, gray grading grade 4 can be made into a perfect printing plate.
2. During development processing, use Huaguang PD type developer solution, the dilution ratio is best controlled at 1:6 to 1:10; the development temperature can be normal temperature, 20 °C ~ 25 °C is the best, not too high, it is best not to be higher than More than 28 °C; development time is not easy too long, especially when the developer concentration is too thick (1:4 or more), the development temperature is too high, the development time must not be too long, generally about 30 seconds or so.
3. When the dried printing plate needs to be revised, it is necessary to use a revised version of the paste that does not affect the coating. If it is found out after revision, it is not necessary to use the modified version of this grade.
4. The choice of cleaning agent is also very important. When the printing plate is reprinted with dirtiness, when cleaning with a cleaning agent (paste), if the quality of the printing plate is affected, resulting in a type-off, do not use it again.
5. When applying protective rubber, it should be thin and evenly coated. Do not apply too much locally. The adhesive is thick and can often bring down the image layer after drying.
6. Other printing conditions can be used under the conditions of use of the conventional PS plate.
If you use the Huaguang YP-U type UV ink positive PS plate according to the above requirements, the printing time is generally up to 2 to 50,000 printed, depending on the circumstances of the printed product. The conventional PS version using UV ink printing can generally only print 3000 ~ 5000 India, after baking version can only be printed 1 ~ 30,000 India.
In summary, the new YP-U type UV ink positive picture PS version recently launched is close to the Fuji VPU version, its solvent resistance is comparable to the Fuji VPU version, and the weak alkali development latitude is greater than the Fuji VPU version. India force up to 3 ~ 50,000 India, to meet the current requirements of China's UV ink printing.
The development of the YP-U type UV ink positive chart PS version was completed and put on the market, which fills the blank of China's UV ink printing plates and provides a new type of high-quality plate for the printing of China's special materials.
Source: "Chinese Printing"