The basics Bluebird FX Bloody Murder Ink Pack. 4 15ml bottles. The benefits BluebirdFX famous concentrated ink formula, for airbrush or direct application.  All can be used on silicon and latex.  The uses A selection of blood colours to give your work true depth and authenticity.  Colors:Bloody Mary, Blood Blister, Dried Blood, Blood The bottom line Great for refilling palettes or simply packing-down to travel light.