Nothing less than professional! If you want to nerd out, here are the deets: We print on high resolution, resin coated, microporous, premium luster photo paper, with the following minimum specifications: 240 GSM Weight 10.4 Mil Thickness 95% Brightness Uploads are digitally analyzed and touched up to achieve the highest possible image quality which ensures the best possible print quality. All photos are printed via 12-ink archival giclée printers.