This shares a name with PO73, which is also called Pyrrole Orange. Sometimes PO71 is known as Transparent Orange or Transparent Pyrrole Orange. This somewhat hard-to-find pigment is a deep, bright red orange.
Some sources list this as ASTM II, others as decent to excellent on the blue wool scale. This is one of several DPP pigments (see below). Much more commonly found in watercolor than oils, PO71 is offered by only one major oil and acrylic paintmaker, however about 8 paintmakers offer it watercolor.
