The plastic bag Printing technology ( printing inside and outside layer )
Printing inside layer : In the more common, printing ink on the printing materials (OPP), then put the clip in the middle, other materials are composite on its both inside and outside, the three layer compound bag. This bag is firm, clean, can prevent leakage packaging packaging, printing ink pollution, built-in liquid, such as food packing case
Printing outside layer : Table just as its name implies is ink printed on bag surface, usually there is no other compounds. Common materials for basic tube membrane, opaque film, single layer film, etc., such as milk bags, bread bags, soil mixed bag and some bags. Milk bag is special, because the milk bag printing material for black and white film or white membrane, the material itself is not transparent, so only in surface printing, whereas other species because of packing firmly, leak proof requirement is not high, do the single bag cost. Single bag for prevent chemical pollution packaging ink, ink can only be printed on the surface. Difference between printed and table in the finished product packaging is simple, due to the printing printing packing with composite membrane on the surface, so the bag on the printing ink will not be scraped off easily, and viewed from the outside color is bright, feel is smooth. Table printing, because the printing is no composite membrane on the surface, so the bag on the printing ink can be scraped off easily, in appearance to see color is darker, feel is rough
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