Folha de segurança, documento de segurança ou artigo e processos de fabricação de uma folha de segurança e de revelação de uma informação mascarada de um documento de segurança ou de um artigo

摘要

A security sheet that includes an information to be exposed and a preferably fibrous substrate in which is preferably totally embedded a ribbon that has a surface A and a surface B and is strippable along the surface B thereof, the information to be exposed being carried by and/or opposite the surface B of the ribbon, a method for making said security sheet, and a security document or article including such a sheet.