1)pad ink,water based,without oil 2)60ml per bottle ,OEM order is welcome 3)ASTM D4236 test standard confirmed No.521 60ml stamp pad ink 1)water based ink,no oil contained2)60ml per bottle ,OEM order is welcome3)ASTM D4236 test standard confirmed1pcs/color box ,12pcs/shr ink ,144pcs/cartonWater based ink,without oil,can be washed easily by water.