The present invention provides a stencil printing process for printing an object to be printed by passing an ink through perforations made in a stencil sheet which has undergone plate-making which includes the following steps: supplying a solid ink capable of causing a phase change into a liquid state at a temperature of 30-150°C into a liquid ink having a viscosity of 10-1,000,000 cps with heat during printing; and passing the liquid ink through perforations made in the stencil sheet within a time of 0.001-10 seconds while pressing the stencil sheet against the object to be printed with a pressure of 0.01-10 kg/cm2 so as to transfer the ink onto the object.
The invention also provides a water-in-oil (W/O) emulsion ink for stencil printing containing 10-90% by weight of an oil phase and 90-10% by weight of an aqueous phase, wherein the oil phase includes a compound capable of causing a phase change from a solid state to a liquid state by being heated to a temperature of 30-100 °C. According to the present invention, offsetting and seeping-through of ink can be prevented while reducing time required for drying, and in addition, side-leakage of ink and end-leakage of ink occurable during printing can be prevented.
本发明提供了一种钢网印刷工艺,用于通过在经过制版的钢网薄片上的穿孔传递油墨来印刷要印刷的对象,该工艺包括以下步骤:在印刷过程中,将能够在 30-150°C 温度下使相变为液态的固态油墨加热成粘度为 10-1,000,000 cps 的液态油墨;在 0.001-10秒的时间内通过网板上的穿孔,同时用0.01-10 kg/cm2的压力将网板压在要印刷的物体上,以便将油墨转移到物体上。
本发明还提供了一种用于钢网印刷的油包
水(W/O)乳剂油墨,其中油相的重量占 10-90%,
水相的重量占 90-10%,其中油相包括一种化合物,通过加热到 30-100 °C 的温度,该化合物能够引起从固态到液态的相变。根据本发明,可以防止油墨的偏移和渗漏,同时减少干燥所需的时间,此外,还可以防止印刷过程中出现的油墨侧漏和油墨端漏。