You must use films for an inkjet printer. The sheets are usually sold in packs of 100 pieces. They come in several sizes usually starting from 8.5 x 11 up to 13 x 19. Some are in rolls if your printer support rolls, this might be more economical. The film doesn't determine the ink coverage, it is your printer. Your printer may need a rip software for best ink coverage, but you may be able to get away with it by playing with your printer settings.I recently picked up an Epson 2200. What is the best film positive paper to use for this printer? Where do purchase the sheets? Then what paper choice do I use in the custom print box in order to get the darkest film possible?