With the use of Trodat replacement pads, you can be sure that your stamps will consistently deliver even and clean impressions. Both the pad material and the ink have been perfected through years of research. That’s why a Trodat impression works just as well in the cold polar circle as it does in the tropical rainforest. All Trodat standard stamp colors are archival quality, ensuring decades of durability for the impressions. The inks used in Trodat replacement pads do not dry out and are completely non-toxic. For 4921, black, new No. 4921.