Process for Preparing Security Paper with Windowed Thread Incorporated on Both Sides Thereof

摘要

PURPOSE: A manufacturing method of security paper having silver thread exposed partly on both sides is provided. It is impossible to counterfeit and to forge coins. CONSTITUTION: The security paper is obtained by the steps of: feeding silver thread forming members(102,102') on protrusions of a wire net before precipitating paper material on the protrusions to expose the silver thread forming members partly; feeding a first paper layer(101) and a second paper layer(101') exposed the silver thread forming members(102,102') partly; setting the first paper layer on the second paper layer, followed by doubling the paper layers; and then applying 0.8-1.5kg/cm¬2 of vacuum pressure to dewater, followed by pressing the paper.