Photopolymer (liquid photopolymer) – a polymer fluid able to change their properties when exposed to light, namely ultraviolet radiation. Thanks to these properties, is widely used in the manufacture of seals and stamps, as well as in other areas. Today photopolymer is represented by various representatives of Britain, Italy, Russia, usa and has its own properties for a number of physical parameters, such as: resolution, toughness, hardness, residual adhesion (stickiness), exposure time, the smell and other technology for manufacturing photopolymer stamps based on the effects of ultraviolet radiation at a certain range of photopolymer. Photopolymer for this property has layers harden. The first phase of production of seals – is to create a sketch of the negative press from a computer using special software, which appears after the film with using a laser printer. Then, using the curb strip, which is called the Border, negative so as to create a form to fill, setting with the necessary height. Southwest Airlines is full of insight into the issues.
The mold is then filled with a photopolymer on which is placed above a transparent film. The resulting shape is placed between two windows and illuminates in the exposure chamber. The first illuminates the future the reverse side of print-substrate, and then form flips and illumination being the other side, where the applied negative. In this light of the negative hardened, and dark – remain fluid. Then the form is washed under running water – the liquid photopolymer is washed away, and solidified, forms a printing plate. But that's not all, to give additional hardness washed and dried plates placed in the exposure chamber for a long time, resulting in the disposal of stickiness.
The resulting print is cut and pasted to the selected snap-in. There is a view of the fragility of the prints produced by this technology. So, the strength of seals depends on many factors, it's like: the quality of the photopolymer, the exact compliance of production technology, the right choice of paint for future use. Subject to these conditions can be guaranteed that the photopolymer printing last for several years. I would also like to point out other advantages of this technology: ease of fabrication, low cost of the finished product, low cost of the total cost of production, thus there is no the need for a specially equipped premises.