Already a client of The Image Flow? Need your photos in a rush? Order prints online with our Classic Upload Form. Our Epson 4900 and P10000 printers work best with 16-bit image files in ProPhoto RGB color space. Edited DNG, PSD, or TIF files are ideal for high-quality photo prints. We can also print from JPG files with our online photo printing services, though they are not recommended for highest quality.