UV Exposure Unit is an important tool in screen making. Working principle: screen printing screens are coated with a light sensitive emulsion using a scoop coater. When the emulsion is dry, place a positive print of your image on the screen. Once you burn the screen, the emulsion that did not get any UV will wash out of the screen exposing the tiny pin holes. The surrounding areas that were exposed to UV will be cured. Hence the ink will pass through screen onto your substrate. * Main features*Based on the User-friendly and practical principles, this machine adopts table top structure, professional design, easy manipulation Digital timer ensures precise exposure time. Time setting range is 0-999 seconds.when users use this machine once more, it will repeat former time setting.Power calls off by itself when count-down is over 8 UV fluorescent bulbs makes exposure even, which guarantees exposure quality Complete accessory tools and spare parts make it easy to maintain and replace Upper surface is covered by 0.3"(8mm) high-strength toughened glass board, anti-pressure, uneasy to scratch skins. Once the glass is broken, it will turn into pieces without sharp edges to insure safety. All-metal shell adopts advanced electrostatic painting inside and outside. Elegant outline, convenient to clean and no rust.