By using ink cartridges & replacement pads for Trodat Printy, you are assured that your stamps always provide clean and regular prints. Both the pad material as well as the ink colour have been perfected over many years of research. That's why a Trodat ink cartridge works just as well in the cold as the tropical heat. All Trodat standard stamp inks are indelible, guaranteeing durability for decades! Two special grip zones allow you to change the cartridges for Trodat Printy without touching the ink cartridge - the fingers always stay clean.