| 摘要 |
PROBLEM TO BE SOLVED: To provide a paper-making sheet material capable of displaying patterns/forms and gradations which a conventional Japanese paper cannot express, only by a transparent fiber material, and a production method enabling repeat reproduction without subjecting specific treatment.SOLUTION: An addition part of a prescribed shape is provided on a paper-making sheet base material 1 formed by coarsely paper-making a fiber material with a relatively long size, by entangling between a gap between the long fiber material, a fiber material which is shorter than the coarsely paper-made long fiber material with the paper-making sheet base material so as to form a dense part by the addition part in a coarse part comprising only the paper-making sheet base material. The dense part is provided with a plurality of parts with different densities, and the coarse part comprising only the paper-making sheet base material, and the plurality of dense parts with different densities are combined so as to configure patterns and figures 3-5 having concentration differences as the whole in a gradation form in the paper-making sheet base material.SELECTED DRAWING: Figure 1 |
