| http://www.w3.org/ns/prov#value | - The substrate can be any as long as it is generally used in flexographic printing plates, and includes, for example, flexible films such as polyethylene terephthalate film, polypropylene film, polyimide film and the like; and flexible sheets made of a polyethylene terephthalate, a polypropylene, a polyimide or the like, having, on the back side, an elastomer such as natural rubber, synthetic rubbe
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