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Do I buy the P6000 or the P7000, which now has the Violet ink as well.
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This may help eliminate one of the
three printer choices. The P7000 comes in a standard and commercial version. The commercial version
substitutes violet ink for LLK leaving only two black inks (PK or MK and LK). You can't get violet and LLK in one ink set.
Epson marketing literature says "Also, the Standard Edition utilizes a Light Light Black ink that allows for finer, smoother gradations between light and dark areas in your print." I would assume that would be especially true of black and white prints, but would also apply to color. The Commercial Edition literature talks more about Pantone color matching capabilities. Between P7000 standard and commercial I picked the Standard version for that reason. The P6000 ink set is the same as the P7000 Standard Edition minus O and G, making the P6000/P7000 (Std) decision similar to the previous 7890/7900 decision. The P7000 in the U.S. is priced at $2600 and the P6000 at $2145. Printing speed is essentially the same, so the issue is really price versus gamut and whether the gamut difference translates into a visible photographic print difference. I wish I could provide a good answer for the last. I think that in some cases it does, but without a side by side comparison no one would ever know.
P7000 Standard ink set...: C, LC, VM, VLM, Y, LK, LLK, O, G, PK/MK
P7000 Commercial ink set: C, LC, VM, VLM, Y, LK, V, O, G, PK/MK
P6000 ink set................: C, LC, VM, VLM, Y, LK, LLK, PK/MK
Good luck with your decision!