GS PLUS inks simulate process colors for vivid, accurate colors. GS means "graphic standard" - setting the industry standard for color gamut and easy calibration. PLUS means 50% faster print-to-lamination time, when compared with previous formulations. With its improved print-to-lamination time and outstanding color range, GS PLUS is ideally suited for a wide range of applications beyond pre-press proofing, including photo enlargements, museum and fine art prints, and indoor posters, signs, and banners. The light and medium cyan and magenta are for the NJ850.