Features: Eventually, the badge humidifier will dry out, but that doesn't mean you have to buy a new one. Just buy this ink, put it on a badge moisturizer, and it will be as good as new. The 28ml ink bottle is hygroscopic, which means it can absorb the surrounding moisture and can be used for a long time. The ink is water-based and free of toxic substances, acid, formaldehyde and heavy metals. Suitable for all ink cartridges that can be refilled. Made of water as the base materialContains no toxic substances, acids, formaldehyde, heavy metalsRe-ink all palm print padsThe impression lasts for decadesSpecification:Brand: TrodatColor: red, blue, black, green, purpleProduct weight: 40 gramsPackage included:1*trodat7011 inkjet inkNotes:1. The actual product color may be slightly different from the picture on website due to various factors such as display brightness and light brightness.2. Please allow the data to have a slight deviation from manual measurement.