Shiny SI-61 Premium Permenant Stamp Ink Black Colour Premium Ink is formulated for the materials below for Art paper, Corrugated paper, Tissue paper, Cellophane, Aluminum, Stainless steel, Textile, Leather, Acrylic, PVC, Rubber, Copper and Glass. ** Seeing that the Premium Ink is volatile, only refill the Stamp Pad (Felt) with adequate volume and stay in a ventilated environment when using it. **Only use rubber die with Premium Ink, but not photopolymer