Hansa Yellow Medium: Its masstone is very similar to Cadmium Yellow Medium but semi- transparent. Clean, bright tint. Use in place of Cadmium Yellow where higher key tint is desired. Also Hansa Yellows' transparencies make them useful for mixing cleaner, brighter secondaries. Pigment: Arylide yellow (PY 74), Vehicle: Alkali refined linseed oil Lightfastness I, Series 3, SEMI-TRANSPARENT.