papel de segurança e método e aparelho para sua produção

摘要

Security paper comprises an opening made during production and with our any sharp edges, reducing the possibility of falsification. Security paper comprises an opening made during production and with our any sharp edges. Independent claims are included for valuable documents made using this paper, a paper sieve with a closure element for making the paper and the production of the paper by forming paper on a sieve with a closure element in order to form an opening.