Stone Stamp Pads VRS Marking’s stone stamp pads use a screw top lid for a maximum airtight seal. The casing is a hard acid/solvent resistant shell that can be used with aggressive solvent based inks. The felt pad under the stone is the main ink storage center. Ink is brought to the surface through capillary action. A consistent flow of ink to the surface allows for excellent nonsmearing impressions. Pads come in two standard sizes. 1" and 2 1/2" diameter.