PAPER FOR PREVENTING FORGERY

• Main Authors: TSUKIJI KENTA, ARIMA TORU, HORIUCHI NAOTO
• Format: Patent
• Language: English; Japanese
• Published: 16.11.2015
• Subjects: BOOK COVERS; BOOKBINDING; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; FILES; IMPREGNATING OR COATING OF PAPER; LOOSE LEAVES; MOVABLE-STRIP WRITING OR READING APPARATUS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; SPECIAL PRINTED MATTER; TEXTILES; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

PROBLEM TO BE SOLVED: To provide a watermarked and threaded paper for preventing forgery, allowing a watermark formed in the thread and a watermark formed in a base material to form a pattern, which can be observed under transmitted light with improved visibility, resulting in excellent authenticity determination.SOLUTION: The paper 1 for preventing forgery having a thread 20 in a part of a base material 2 includes a first watermark part 11 having a transmittance different from that of the base material 2 and a second watermark part 21 having a transmittance different from that of the peripheral region due to the removal of a part of the thread 20 in a penetrated state. The first watermark part 11 and the second watermark part 21 form a watermark pattern 30. The transmittance of the region having the second watermark part 21 is equal to or less than the transmittance of the base material 2, or equal to or more than the transmittance of the base material 2. In the second watermark part 21, the area ratio of the thread 20 to be removed is partially different, so that a watermark having a gradation is visually recognized. 【課題】すき入れとスレッドが重複して施された用紙において、スレッドに形成したすかしと基材に形成したすかしによって、一つの模様を形成し、透過光下で観察できるすかし模様の視認性を向上させることで、真偽判別性にも優れる偽造防止用紙を提供する【解決手段】基材２の一部にスレッド２０を備えて成る偽造防止用紙１において、基材２と透過率が異なる第１のすかし部１１と、スレッド２０の一部が貫通した状態で除去されることで、周りの領域と透過率が異なる第２のすかし部２１を形成し、第１のすかし部１１と第２のすかし部２１によって、一つのすかし模様３０を形成する偽造防止用紙。第２のすかし部２１が形成された領域の透過率が、基材２の透過率以下又は基材２の透過率以上であり、第２のすかし部２１は、除去されるスレッド２０の面積率が部分的に異なって成り、階調のあるすかしとして視認される偽造防止用紙１。【選択図】図４