A couple of weeks ago, I found a mangy, dried-up tube of the stuff in a heap of junk! Along with other treasures. SO! I have spent part of my morning trying to re-create Purple Madder. Here is the recipe:
Some Brown Madder
A speck of Indigo
A speck of Dioxazine Violet.
All artist quality Winsor Newton colours.
Ta-Daa! Good luck, and Quit Moanin'!