Compared with coated paper, offset paper has poor surface smoothness, poor penetration into the binder in the ink, and the ink tends to accumulate on the paper surface. Sometimes the ink surface has been oxidized and conjunctival, but it can not be completely dried. Therefore, when printing the back side of offset paper, the printing ink on the front side is not completely dry, and the ink will dry on the impression cylinder during the back side printing. The pressure on the text is increasing, which eventually makes the front picture and text false and unrealistic. If you do not often sample and inspect during printing, a lot of waste products will be generated, causing unnecessary waste. Solution It takes a long time for the ink to dry completely before printing on the back, and daily production is impossible. Take the method of wiping the impression cylinder frequently, so that the accumulation of the ink layer on it is not too thick, reducing the impact on the front image and text, and can basically solve the problem. Generally, this problem will not occur below 3000 prints, and the more the number of prints, the more obvious. To avoid such problems, you must make more samples and check more. 100% BRAND NEW Surgical Face Mask, with a filter encased in 3 layers of non-woven fabrics. It has high filtration efficiency and is best to prevent from the horrible flu in this season. Also helps avoid some disease, infection and reduce the spread of germs and bacteria. It could bring the health to you! Face Mask wholesale surgical face mask Zhejiang Youquan Care Products Technology Co., Ltd. , https://www.youquancare.com
Item Details:
Anti-Flu, with a filter encased in 3 layers of non-woven fabrics
With elastic ear loops of straps and a nose piece of plastic wrapped aluminum strip
High fluid and respiratory protection
Lightweight, easy to pack for convenience
Ideal for Protection and comfort for the surgical team
Suitable for yard work, house cleaning, sickrooms, infant and elderly care and etc
Package Includes: 50pcs Medical Ear-loop Respirator Face Surgical Mask