Huaguang resin version, Dunlop plate (certified), resin version supplied by Dunlop Advertising Co., Ltd., Zhengzhou. Zhengzhou Dunlop Advertising Co., Ltd. (#) is specialized in "flexographic, resin version, printing, packaging design," the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Manager Zhao. There are four main ways of printing: offset printing, stencil printing, letterpress printing, gravure printing. Offset printing is a planographic printing, a screen printing stencil printing, and flexographic printing is a letterpress printing. Offset printing: printing graphic printed in the middle of the first carrier (blanket cylinder), and then transfer to the indirect printing on substrates. This can be a good way to make up for printing substrates is not flat, so that the full transfer of ink. Lithography: printing is most widely used. The advantage is that printed job fast, low cost. The disadvantage is that the balance between water problems caused by ink in color, moist paper as contraction, resulting in the final misregistration. Screen printing: printing squeegee squeeze through, the ink is transferred through the graphic part of the mesh to the substrate, forming the same with the original graphic. Modern screen printing is the use of light-sensitive material by photolithography method of making screen printed version (make holes in the screen printing screen version of the graphic part of the through-hole, rather than the graphic part of the mesh holes are blocked live). Screen printing equipment is simple, easy to operate. This approach can be used for a variety of printing materials or convex surface printing. Printable slow, low throughput, the ink to be dried. Flexographic printing: the use of flexo, passing through the anilox roll printing inks. Flexographic printing is required to produce a convex mirror image printing on polyester material - like everyone's seal. Printing surface during rotation in contact with the printed material, which is transferred to the graphic, letterpress printing is very promising technology. Advantages of flexographic printing: movable type may not require the plate, only the text can be printed check typesetting, its clear and neat lines, and strong resistance to brush, revision easy; inks strong, bright colors, fonts and line stamped clear and powerful. Disadvantages of flexographic printing is the high cost of color printing. 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 continuous ammonia volatilization during the printing process, the operator will from time to time to add a new ink and ink additives Huaguang resin version, so the ink PH value may change at any time. PH value using a standard meter, 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 based ink viscosity increases, and ink is easy to dry, to the version of the block and the anilox roll, causing the layout dirty, and create a bubble. PH value impact on water-based ink printability mainly in ink viscosity stability and dry in terms of clarity and outlets. With the increase of the PH value of the domestic resin version, ink viscosity decreases, the drying rate too 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, which includes a pressure plate and between the substrate and the anilox roll and between the plates pressure. 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.