EFFECT OF SURFACE ENERGIES ON SCREEN PRINTING RESOLUTION

The influence of surface energies on Line resolution in screen printin g was studied in this paper, Ink wettability on surfaces is decreased by decreasing the surface energies of substrates-the reduction in wett ability improves the line resolution, For such high surface-energy sub strates as ceramics, the effective means to improve the line resolutio n is to use high thixotropic inks. On the other hand, for low surface energy polymer substrates, the line resolution can be heightened by in creasing the surface energies of inks, If the critical surface tension of a substrate is lower than the surface energy of inks, good line re solution can be achieved even though low viscosity inks were used, The use of low viscosity inks has quite a lot of advantages.