... high speed steel is 63-66HRC. It is specially suitable for cut art paper, copy paper, metal laminated paper, card ... main products as follows:1. printing industry: we supply blades for many paper guillotine cutters, such as polar, Whlenbberg, Perfecta, ... .4. others: ice resurfacing knives, die cutting knives, blades for bending machine, mould cutting knives. Knives for Printing & Paper Making Industry