30ml alcohol ink in soft blue for fluid painting, epoxy resin, resin art and mixed media projects. Octopus Fluids alcohol ink in ARCTIC OPAK is an opaque and fast-drying alcohol-based paint. The colors of the Octopus Fluids series OPAK have been specially developed for use on dark surfaces. Delicate pastel effects can be achieved on white or transparent surfaces and can be mixed with each other as well as together with our transparent alcohol ink paints. The opaque pastel shades are also suitable for realistic painting. In order to ensure optimal distribution of the color pigments, the colors must be shaken well before use. Our alcohol inks can be used on almost any smooth, non-porous material. Synthetic papers (such as Yupo paper), glass, metal, ceramic, porcelain, stone are best suited — the uses of alcohol ink are almost limitless.