| 摘要 |
PURPOSE:To form a multicolor pattern by applying and impregnating a moisture curing type polyurethane-base sealer on a base plate and thereafter forming a printed film thereon. CONSTITUTION:A moisture curing type polyurethane-base sealer (a prepolymer having free isocyanate group being a reaction product of polyisocyanate and polyol) is applied and impregnated on/into a base plate such as a slate plate and a cement plate. Thereafter a multicolor pattern is applied on the base plate by screen printing. As a screen gauze, material having mesh number not more than 100 mesh is used. As the paint to be used, unsaturated polyester- base, acryl-base and epoxy-base solventless type paint or the like and paint having 100-400 poise are used. Thereby cost is made low in comparison with the other printing means and both color change and change of a pattern are facilitated.
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