Standard datasheet of pad printing silicon rubber: Model:268 Appearance:r/y/g/w Viscosity (cs):25000~30000 Hardness (ao):28~30 Tensile strength (kgf/) Tear strength (kgf/cm):16 Shrinkage (%):0.3 Elongation (%):350 Mixing ratio(%):2~3 Operating time(h):0.5 Curing time(h):2~4 25kg/drum, 200kg/drum