Green Galaxy Stretch Core is a ready-for-use, transparent, stretch water-based ink that can be used in a variety of ways. You can use it as a stand-alone mixing base with the Fusion Mixing System to create custom Pantone colors (following the directions in the Fusion Mixing System). You can also use it as a replacement for Opaque Core or with Clear Core and Opaque Core to make water-based mixes behave more like plastisol ink.