Gravure, lithography, letterpress printing, stencil printing, thickness of ink from large to small, how to row?
Ink thickness in different printing methods:Average ink layer thickness of printing method (U)Print: 0.7-1.4;Gravure printing: about 10;Embossed: 2-5;Screen printing: 6.0-100;
Viscosity: a characteristic of an ink that hinders its relative flow. A unit of viscosity equal to s sec (Pa. S). The viscosity of screen printing ink is high in all kinds of ink (see table 4-4). Viscosity has great influence on printing effect. The viscosity is too large, will make the ink transfer difficult, imprinting integrity, fastness and gloss are worse, even cause a shortage of ink and drawing, net section plugging problems; viscosity is too small, the imprinted enlarge clarity, easy dirty, printing and printing.Comparison of ink viscosityViscosity of ink type (Pa. S)Letterpress ink: 10-100Aniline ink: 0.1-0.2Gravure ink: 0.05-0.20Screen printing ink: 1-100Offset ink: 10-100Usually the preparation of ink viscosity is greater than 4Pa, s, and the use of viscosity, should be adjusted as the mesh size, pattern size, printing speed and the printing surface of printing performance and temperature, allowing changes in the range of s 1-100Pa.
