Epson Stylus Pro 4000 Product Reference Manual page 9

Two Built-in Black Ink Modes – Photo Black & Matte Black
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Depending upon the media type being used, printer will automatically switch between
Photo Black and Matte Black Ink modes to optimize black ink density for your specific
media type. By optimizing the black ink density, optimal print quality can be achieved.
Epson Photo Black Ink Technology
– Epson's patented Microcrystal Encapsulation Technology encapsulates an acrylic
resin around the pigmented ink particle. This allows for optimal image quality on
coated ink jet and other photographic medias such as Epson Premium Luster,
Premium Glossy, and Premium Semimatte Photo Papers.
– Depending upon the media type, you can achieve a black D-Max up to 2.0
Epson Matte Black Ink Technology
– Matte Black ink is a pigmented black ink that does not use our acrylic resin
encapsulated technology and is optimized for plain paper or matte media types
such as Epson Enhanced Matte, UltraSmooth Fine Art, Somerset Velvet, etc.
– Depending upon the media type, you can achieve a black D-Max up to 1.69
Photo Black can be used for ALL media types, but some plain paper or fine art media will benefit greatly by using the Matte Black Ink Technology
Epson UltraChrome Ink Technology
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