Abstract: A resin composition for stencil ink comprising: (I) a non-aqueous dispersion comprising; (a) a resin for dispersing; (b) a particulate resin comprising a film-forming linear acrylic resin, and (c) at least one solvent that can dissolve the resin (a) therein but cannot dissolve the particulate resin (b) therein, the solvent being selected from the group consisting of paraffinic hydrocarbon solvents, isoparaffinic hydrocarbon solvents and naphthenic hydrocarbon solvents; (II) a colorant; and (III) an emulsifying agent. Also disclosed is a water-in-oil stencil ink comprising the resin composition and water.

Abstract: A water-in-oil (w/o) emulsion ink for stencil printing, which contains carbon black having a pH of 5 or lower, preferably 3.5 or lower as a colorant added to the oil phase, in an amount of 2-10 % by weight based on the total weight of the ink, is provided. The emulsion ink is improved in phase separation in course of time and stabilized while printability is kept well.

Abstract: Provided is a device which can form favorable perforated images corresponding to the resolution of the thermal head, reproduce faithful printed images for all kinds of original picture images, avoid ink transfer, and adapt itself to different environmental conditions, and is suitable for use with different thermal recording materials such as thermal recording paper, OHP TP sheets, and thermal stencil master plates.

Abstract: In the thermal stencil master plate and the method for processing the stencil master plate according to the present invention, since swelled and solidified unprocessed regions formed by film lumps or a part thereof produced from the melted film are provided continuously, the merging and excessive expansion of the perforations can be avoided so that clear printed picture images may be formed even in the regions of solid picture images. Further, the ink passing through each of the perforated dots is reliably separated from the ink passing through adjacent perforation dots before it is deposited onto the printing paper so that excessive deposition of the ink is avoided and the time required for drying the printing ink is reduced so that offsetting may be avoided.

Abstract: In the thermal stencil master plate and the method for processing the stencil master plate according to the present invention, since swelled and solidified unprocessed regions formed by film lumps or a part thereof produced from the melted film are provided continuously, the merging and excessive expansion of the perforations can be avoided so that clear printed picture images may be formed even in the regions of solid picture images. Further, the ink passing through each of the perforated dots is reliably separated from the ink passing through adjacent perforation dots before it is deposited onto the printing paper so that excessive deposition of the ink is avoided and the time required for drying the printing ink is reduced so that offsetting may be avoided.