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The new style HDR inks are similar (improved) pigments inks to the K3 Ultra Chrome pigment style inks. They expanded to color gamut (hexachrome) by adding a Green and Orange color ink to the system. They are still pigment style inks.
If using the Stock Epson HDR inks in the new style printers be sure to match it with a proper "pigment" style waterproof film.
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