Sharkarstein is a film viewing lamp box (illuminator) for perspective X-ray pictures (negative).The lamp box generally uses a lamp, preferably a PC board, which can withstand high temperature up to 145 degrees and low temperature up to - 45 degrees.The inside is usually illuminated by fluorescent lamps, so it is very beautiful from the outside.There are also advertising cloth for light boxes (commonly known as light box cloth), and the ink uses oily ink. In order to ensure the durability of the picture, the painting company generally uses a darker picture color than the color on the display.Its actual output image resolution generally only needs 30-45DPI (compared according to the printing requirements), and the actual size of the image is relatively large, with an area of hundreds of square meters.In fact, there are many kinds of light boxes, some of which also have round blister light boxes. Sometimes you can see them at the entrance of the mall.
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