... Low content of arom-hydrocarbon,4) Heavy metal element free5) High concentration6) Excellent overlapping quality ... for high-speed printing of high class matte paper. Operation Attention Ink Adjustment: All inks ... ink roller. Pass SGS testing : The metal contents of stibium,arsenic,barium,chrome,cadmium,lead,mercury,selenium is below 0.5ppm. Offset printing ink ... Morohoshi Rub Tester ink offfset printing