Security Threads
There are two kinds of security threads. One is a thin aluminum coated and partly demetalized polyester film thread with microprinting which is embedded in the security paper as banknote or passport paper.
The other kind of security thread is the single or multicolor sewing thread made from cotton or synthetic fibers, mostly UV fluorescent, for the bookbinding of passport booklets.
Read more about this topic: Security Printing
Famous quotes containing the words security and/or threads:
“Learned institutions ought to be favorite objects with every free people. They throw light over the public mind which is the best security against crafty and dangerous encroachments on the public liberty.”
—James Madison (1751–1836)
“Illusion, Temperament, Succession, Surface, Surprise, Reality, Subjectiveness,—these are the threads on the loom of time, these are the lords of life.”
—Ralph Waldo Emerson (1803–1882)