Epson UltraChrome® GS ink technology introduces eight individual colors – including an all-new Orange and Green. Developed exclusively by Epson, UltraChrome GS ink technology eliminates the need for external dryers and air purification systems. And not only have we dramatically reduced harmful VOC's, but we've completely removed the element Nickel (Ni) from our inks. The result? A high-performance solvent-based ink technology with stunning color gamut and accuracy, while having less impact on the environment.