The fountain solution of a commercial rotary offset press is different from the newspaper rotary printing and more different from the offset offset printing. It requires that the fountain solution is conducive to a stable water-ink balance, with less water on the ink, to ensure the concentration of the ink, and to reduce emulsification, even if the machine is running for a long time, it can still ensure stable printing quality and rapid start of the machine.
In the continuous water delivery system, the concentration ratio of the additive in the imported water bucket liquid is 2%-3%, the IPA (isopropyl alcohol) ratio is 6%-8%, and the hardness of the solvent water used is 40-250DH, The PH value is controlled at 4.9-5.2 (it can be adjusted slightly according to the hardness of water), and the conductivity is 800-1200 μs / cm; at the same time, the fountain solution should be used so that the ink roller does not leave calcium deposits and reduce the residue on the blanket The ink and paper powder should be able to effectively prevent foam and microorganisms.
When the PH value of fountain solution is too low. The fountain solution will chemically react with the desiccant in the ink. In general, the stronger the acidity of the fountain solution, the slower the ink will dry; the PH value is too high, often caused by the IPA value is too high, will make the ink film lose gloss, The surface of the printed matter looks dull and dull.
Teaching Interactive Whiteboard
The use of high-efficiency multimedia teaching Interactive Whiteboard in education will not only improve the teaching efficiency of the school, but also improve the teacher's ability to guide students correctly, and teaching smart whiteboard can let teacher spend time in effective places instead of wasting ineffective things. The intelligent touch teaching all-in-one machine gives teachers more room for expression. The teaching smart digital board belongs to the teaching market, and the teaching interactive smart board market has been growing rapidly since the end of 2015.
Teaching Interactive Smart Board,Teaching All-In-One Machine,Teaching Smart Digital Board,Teaching Smart Whiteboard
Guangdong Zecheng Intelligent Technology Co., Ltd , https://www.zecheng-security.com