Here at ArtPress we run both the IRIS 3047 printers and the Epson 9000 series printers. What are the basic differences? Well, they both run “Giclee” prints, and they both can use a variety of substrates. The major difference is in the inks and the substrates. The IRIS printer uses a dye base ink set on uncoated papers. The Epson uses a pigment base ink set on coated papers and canvas. They each have a unique look that is very different. The IRIS print has a more “painterly” feel due to the inks being “absorbed” into the watercolor paper. These prints are very durable and resist scuffing well, so Artist reps like them for transporting to clients. However IRIS prints are not waterproof and are easily damaged by moisture so proper handling is important. The Epson print is very waterproof because of the pigmented inks, but very prone to “scuffing” due to the thin emulsion that the ink sets on top of. Epson prints tend to have a “sharper” look overall, and are well suited for photography. The color gamut of the Epson is bigger than the IRIS, the IRIS only has a 4 color ink set (CMYK) whereas the Epson has a 7-10 color ink set (depending on the model) that provides more vivid color. So if a painting or photograph has a lot of bright, vivid colors the Epson is a good choice. However the IRIS excels at subtle nuances of tonal gradation and earth tones so it is a good choice for watercolor and landscape artists. In terms of longevity the Epson wins with a Wilhelm tested life span of 100 years or more, the IRIS with the Pinnacle Gold ink set will last about 75 years.
In the end, both machines will provide a beautiful print, it is up to the artist to decide what printer is best for them and thier work.