Epson STYLUS PRO WT7900 Reference Manual page 8

Epson UltraChrome HDR White
The World's First Aqueous-Based White Ink Technology
Unique High-Density Pigment Chemistry Developed by Seiko Epson
Amazing White Density – Along with White Density Control & Color Toning
Extreme High Dynamic Range Color Gamut
Professional Short-term Color Stability for Mission Critical Color Proo ng
Fully Compatible with Epson ClearProof™ Film and Epson MetallicProof™ Silver Film
Safe Water-Based Pigment Ink Technology
Sets a New Standard for Professional Color Ink Technology