A PRINTING METHOD FOR THE SAFE DOCUMENT WITH BUILT-IN COPYING-PREVENTION SHADING

摘要

The invention relates to a printing method for the safe document with built-in copying-prevention shading. The prior art needs to use the expensive special paper of the prevented copying shading printing and the freedom of design of the copying-prevention safe shading is low. The invention integrates the module of the copying-prevention safe shading into the printer's drive. The module transfers parameters to the printer drive by the joint function. Then the printer driving program transfers the corresponding function module to create the digital watermark data which contains the copying-prevention safe shading and saves the data to the page descriptive document. It amalgamates the data of the normal printing document and the digital watermark document to create a new document and print. Adopting the invention can implement the coinstantaneous print of the copying-prevention safe shading and the normal document data. The method is applicable for normal paper and improves freedom of design in copying-prevention safe shading.