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 , sinine sünteesvärvaine