According to statistics, China's annual sales revenue of more than 5.00 million packaging companies have more than 10,000, of which nearly one-third of plastic packaging products business. These companies in the past only a few companies have their own testing laboratory, and now small businesses have begun to attach importance to establish their own testing room. Experts pointed out that since most plastic packaging products with barrier water vapor, oxygen, carbon dioxide function, so in this respect detection equipment demand will increase. Currently plastic intaglio ink to solvent-based inks based, excessive benzene harmful to human health, while high speed gravure plate must be used to meet the volatile ink printing requirements, which makes environmental issues particularly in the gravure printing process prominent. Water-based ink does not contain volatile organic solvents, completely eliminating the solvent-based inks toxic and harmful substances, to avoid contamination of packaged goods produced, is currently the only variety of ink through the FDA-approved non-toxic inks. At present, only a handful of domestic manufacturers of the varieties of ink, but because of its water-based gravure ink adhesion, printing speed, gloss, etc. can not fully achieve the level of performance solvent-based inks, and sometimes can not meet the plastic film color printing packaging manufacturer Claim. Carton printing has evolved from monochrome printing to color printing, color printing of carton business is started, although in general, due to the quality of plates, printing plates, plate technology, printing machinery and other conditions, constraints, China's printing appearance The carton is still one of the few, but this is the trend of development. Must be noted that the development of flexographic printing is to reduce the cost of a carton production pathways, although carton flexo printing in China has just started, but it should be soberly aware of its potential energy. To continually review and exchange board surface quality improvements, factors roller, flexographic printing plates and plate technology, the printing technique, water-based inks and other improvements and development, through practice-plate manufacturers, Overcoming Difficulties ink PH value ■ PH value of ink PH value affects the viscosity of the ink application needs to control the other indicators, the normal range is 8.5 to 9.5, then the best printing performance water-based inks, the printing quality of the most stable. Due to volatilization of ammonia continuously during the printing process, the operator also from time to time add new ink to the ink, and various additives, so PH value of the ink may change at any time. PH value using a standard meter resin plate making, you can easily measure the PH value of the ink. When the PH value is higher than 9.5 when the flexographic plate, too alkaline, water-based inks to reduce the viscosity, drying speed is slow, water resistance is deteriorated, prone to scumming; and when the PH value of less than 8.5 that is too weak alkaline , the viscosity of the water-based ink increases, and ink is easy to dry on the plate and the block to the roller, causing the dirty pages, and generate bubbles. PH value of the impact on water-based ink printability mainly in the dry ink viscosity stability and clarity of terms and outlets. With the increasing value of PH, the ink viscosity decreases, the drying speed is slow. Experience in application of water-based ink cardboard printing process often encounter some problems, cause analysis and solutions may refer to the following: ◆ printing pressure adjustment is critical, which includes intermediate pressure between the plate and the substrate and anilox and plate pressure. If the ink viscosity is too high, too fast ink drying problems, the solution is to adjust the pressure, diluted ink, add slow drying agent. ◆ ink is dry on the printing plate, printing edge blur, it may be on the hot air blown plates, paper fibers mixed with ink cause static reaction, the elimination approach is diluted ink and gradually speed up, will cover the ink system, or replacement inks, Installation went static devices. Carton printing plate | Zhengzhou Dunlop advertising (certified) | Pingxiang plate supplied by Dunlop Advertising Co., Ltd., Zhengzhou. "Flexographic, resin version, print, packaging design" Preferred Advertising Co., Ltd., Zhengzhou Dunlop (2), the company is located: Chemical Road, Zhengzhou City, the northwest corner of Narcissus Road, over the years, Zhengzhou Dunlop advertiser to provide customers with the best quality Services, Contact: Manager Zhao. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Zhengzhou Dunlop ads look forward to be your long-term partner!