a blue dye-stuff prepared from chinoline with amyl iodide, used in calico-printing, cyanine blue: the name of a permanent blue pigment, a compound of cobalt and Prussian blue, CYANINE (including METAL-STABILIZED CYANINE) This is the original dye polymer used in the Orange Book specification for recordable media. Discs using this type of dye can be identified by the emerald green or cobalt blue. (The dye itself is blue, but will appear different based on the material used for the reflective layer. A gold reflective layer will produce the green while a silver reflective layer will produce the blue)., sinine sünteesvärvaine