Isoindolinone Yellow. This is a fabulous, under-recognized warm, transparent yellow that is incredibly useful in mixes. It also makes a great yellow for sap green convenience blends and is quite versatile. It is reported to have excellent lightfastness. The transparency of this yellow is a huge attraction, though it is a slow dryer.
Painter Kathleen Hudson noted that it can be used in mixes without adding a lightening effect to the overall mix (in contrast, cadmiums sometimes end up raising the lightness of a blend). We have found it be outstanding for mixing greens.
