Suitable for Trodat Printy stamps 4911 4911 Typo 4951 4822 4800 4820 and 4846. Replacement of the ink pad is made easier and cleaner thanks to special grips avoid touching the pad insert. The ink is water based and contains no toxic substances no acid no formaldehyde and no heavy metals. The ink is hygroscopic meaning that it self regulates by absorbing the humidity of the surrounding air so that it does not dry out allowing prolonged usage. The pads are available in black blue red green and ...