FLUORESCENT FIBROUS MATERIAL, PAPER FOR PREVENTING FORGERY BY USING THE SAME AND PRINTED MATTER FOR PREVENTING FORGERY

摘要

PROBLEM TO BE SOLVED: To obtain a fluorescent fibrous material, having strong coloring strength, excellent in light resistance, causing good yield of water-insoluble fluorescent particles (hereinafter referred to as fluorescent particles) in producing the fluorescent bibrous material, capable of producing even small lot thereof by using a simple apparatus without releasing the fluorescent particles from the fibrous material during production of paper sheets and good in yield in papermaking, and obtain a paper sheet for preventing forgery by using the fibrous material and obtain a printed matter by using the same paper. ;SOLUTION: This fluorescent fibrous material is obtained by fixing water- insoluble particles having 0.1-100 μm average particle diameter and emitting fluorescence by irradiation of ultraviolet rays onto the surface of the fibrous material having ≤5 mm weight average fiber length in high speed air stream by impact method. The paper sheet for preventing forgery is obtained by adding the fluorescent fibrous material during papermaking. The printed matter is obtained by applying a prescribed printing to the paper sheet for preventing forgery.;COPYRIGHT: (C)1999,JPO