Class I – Topical UseHome » Products Class I - Topical Use Available Inks with a CLass I certification:PLT4G #11 YellowPLT4G #21 RedPLT4G #30 BluePLT4G #40 GreenPLT4G #60 WhitePLT4G #65 Black Printable Area: Certified inks for topical use.