Ink pads suitable to fit the Trodat Printy 4922 Rubber Stamps. The ink is manufactured with a water base 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 6/4922 replacement ink cartridge is available in a variety of colours black, blue, green, red and violet. Dry felt pads are suitable for special inks. The pads are sent out as a multiple pack of two.