... parent number is 200510028805.8. The high speed steel paper cutting knives have high hardness, wear-resistance and long service ... 63-66HRC. It is specially suitable for cut art paper, copy paper, metal laminated paper, card board, PVC, metal foils and rubber ... supply blades for many paper guillotine cutters, such as polar, Whlenbberg, Perfecta, Itoh, Schneider Senator and other blank knives, etc.2. ...