Archival Inks provide long-lasting stamping results that are permanent on many surfaces. Get a crisp image that doesn"t bleed over water-based inks and markers, acrylic paint, water colors, Adirondack Alcohol Ink, or Perfect Pearls Pigment Powders. Available in various shades. Oversized ink pads (Jumbo #3) measure 4-1/4" x 6-1/4" for brayering and easy inking of large stamps.Acid-freeNon-toxicWaterproofPermanent on matte and gloss papersAir dries on matte surfacesHeat set on glossy surfacesConforms to ASTM-D4236. Made in USA.