If you want to create a tone-on-tone effect, our Watermark Pad is the perfect choice. This water-based ink is slow-drying and works best on porous paper to create an image that is a slightly darker color than the paper itself. Raised foam stamping pad measures 1 7/8" x 3 1/2". Plastic case with locking lid. Ink is acid-free and nontoxic. Heat setting is preferred. Use on glossy paper is not recommended.