PH value PH value ■ PH value of the viscosity of the ink ink ink application affects another indicator of the need to control its normal range of 8.5 to 9.5, then the best water-based ink printing performance, the most stable printing quality. Due to volatilization of ammonia continuously during the printing process, the operator also from time to time to the ink in the new ink and the various additives added, so the PH value of the ink may change at any time. PH value using a standard meter flexible version of the production, you can easily measure the PH value of ink. When the PH value is higher than 9.5, too alkaline, water-based ink viscosity decreases, slow drying rate, poor water resistance, prone paste version; and when the PH value is lower than 8.5 i.e. weak alkaline, the water Viscosity-based inks will rise, easy to dry ink, plugging into the version and the anilox flexographic printing, causing the layout dirty and bubbles. PH value impact on water-based ink printability mainly in ink viscosity stability and dry in terms of clarity and outlets. With the increasing value of PH, ink viscosity decreases, the drying speed is slow. Application experience water-based ink in cardboard printing process often encounter some problems, analysis and solutions may refer to the following: ◆ printing pressure adjustment is critical flexo, which includes a pressure plate and substrate and between the anilox and plate between pressure version. If the ink viscosity is too high, too fast ink drying problems, the solution is to adjust the pressure, diluted ink, slow drying agent added. ◆ ink dry on the plate, printing blurred edges, it may be on the hot air blown plates, paper fibers mixed with ink resulting in static response, elimination approach is gradually diluted ink and speed, will cover the ink system, or replacement of ink, installation to static devices. Circulating the developer is stirred for developing the PS plate with the developer by contact between the photosensitive layer, a resin dissolved to complete flexographic, use more power and therefore development method. Such as hand shaking when developing needs of the developing tray, circulation pump and brush is used to speed up the flow and circulation roll means the developer of mechanical development, the developing speed and developing improved uniformity. Instead development using static way, the developer can not effectively flow circulation, developing speed is significantly reduced, developing uniformity is poor. Flexographic printing, flexo, Dunlop plate provided by Dunlop Advertising Co., Ltd., Zhengzhou. Zhengzhou Dunlop Advertising Co., Ltd. (#) strong, credible, in Zhengzhou, Henan Province of plate making, printing supplies and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Dunlop plate and you hand into the brilliant, for a better future!