The new 6/50/2 replacement ink pads are suitable to fit the Trodat Professional 5212 rubber stamp and 54120 date stamp. 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. 6/50/2 ink pads are available in an array of colours: black, blue, green, red or violet.