Water based Refill Ink used to ink or re-ink self-Inking Stamps and small Stamp Pads. Works with any brand of self inking stamps or stamp pads. Works on porous surfaces such as paper and wood. Will not dry on wax, plastics, etc Vibrant and intense color will not bleed or spread on paper, which make the print sharper. Easy to apply. Bottle has drop-controlled tip. From bottle, squeeze a few drops of ink as needed, on the stamp pad. Do not over-ink the pad. Replenish your old rubber stamp pads or self inking stamps for a fraction of the cost of new ones with ExtraMark Premium Refill Ink. ExtraMark is known for creating high quality products that simplify home or office tasks. Don't settle for generic ink that leaves faded impressions. Use ExtraMark Premium Refill Ink for crisp images every time.