Stamp pads and self-inking stamps that use black, non-porous stamp pad ink. The Non-Porous Ink works with both Stamp Pads and Self-Inking stamps, and it can be stamped on any smooth surface. The unique component needs to be well matched to the felt pad material. Applicable to: Any type of paper. China Plastic Cellophane, Aluminum, Stainless Steel, Textile Leather, Acrylic, PVC, Rubber, Copper Glass