Water-induced anti-counterfeiting paper and preparation method thereof

Abstract

The present invention discloses a water-induced anti-counterfeiting paper and a preparation method thereof, belonging to the field of anti-counterfeiting technology of paper. The water-induced anti-counterfeiting paper consists of a base paper layer and an anti-counterfeiting label thereon. The anti-counterfeiting label is a colorless, invisible pattern or character, and does not have any effect on the appearance of the base paper. When contacting with water, a transparency of a location where the paper has the anti-counterfeiting label increases, and thereby a character or a pattern appears. After drying, the character or the pattern disappears, and the paper reverted to normal. The water-induced anti-counterfeiting paper may be prepared by method of printing the anti-counterfeiting label at a surface of the base paper by processes such as printing, code-spurting and inkjet printing according to requirements. Compared with the existing anti-counterfeiting surface-printing technology and other anti-counterfeiting embedment technology, the water-induced anti-counterfeiting paper is low in cost, the process is simple, and is not easy to be imitated; and its identification method is simple, its anti-counterfeiting effect is remarkable, and detection is repeatable.