Printing – Stenciling – Processes
Patent
1996-02-28
1998-03-03
Funk, Stephen R.
Printing
Stenciling
Processes
101119, 101491, 106 3126, C09D 1102, B41M 112
Patent
active
057223220
ABSTRACT:
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.degree.-150.degree. 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 a 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/cm.sup.2 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.degree.-100.degree. 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.
REFERENCES:
patent: 3577915 (1971-05-01), Thompson
patent: 3656428 (1972-04-01), Duncan
patent: 3872044 (1975-03-01), Hervey et al.
patent: 4561789 (1985-12-01), Saito
patent: 4730556 (1988-03-01), Cobbs, Jr.
patent: 5439515 (1995-08-01), Kurabayashi et al.
patent: 5487334 (1996-01-01), Chew et al.
Funk Stephen R.
Riso Kagaku Corporation
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