Hello SamWrites. The ET-2800 is tested to work with most Epson Photo Paper, Plain Paper, and some Cardstock. The thickest option supported by the printer is Epson Premium Photo Paper Glossy which weighs 79 lb. For Cardstock, we recommend using something that weighs around 44 lb. Please note if you plan to use 3rd party paper, we recommend testing different ones first, as print quality can always vary based on Brand, Paper Type, Surface Coating, and Texture. Regards, Kevin - The Epson Team.