纸张是印刷各种包装的物质基础，一些采用特殊工艺制造的专用纸具有防伪特点，在专用纸张中采用的防伪技术之一就是防伪短纤维。防伪短纤维的使用方法有两种，一是在造纸过程中将红、蓝、绿、棕色等彩色短纤维、各种荧光短纤维掺入纸浆内，二是在纸张未定型前或涂布胶水后将防伪短纤维撒在纸张表面，在自然光或紫外灯照射下即有不同效果色光或荧光反射。

Anti-counterfeit fiber(anti-forgery fiber,anti-clone fiber, authentication fiber, tracing and tracking fiber, anti-theftfiber, traceability fiber, security fiber):

The fiber's length is between 1 millimeterand 10 millimeters, it's diameter is between 20 micrometers and 100micrometers. There are three major types of the fibers: 1, Visible securityfiber (such as red, green, blue, also called visible fiber). 2, Invisiblesecurity fiber (also called colorless UV fluorescent security fiber), it canfluoresce(such as red, green, blue) under the ultraviolet light. 3, Compositefiber: There are more than one anti-counterfeit features on a fiber which canbe made by customer's order.

The paper is usually used to make thepackaging of products. Sometimes the paper of the packaging need to be addedsome anti-counterfeit features. To add the security fiber in the paper pulp isa effective method to make the anti-counterfeit paper, another method is todistribute the fiber on the surface of the paper which is covered by the glue. It is very difficult to counterfeit the packaging which is made by the paperwith security fibers.