I made some osage dye at one point. Happened by accident, was using a 3" double wall water heater vent pipe to steam a limb on an osage stave. Had it at a 45 degree angle so the water would run back into the pot I had on a hot plate. Used a storm collar screwed to the bottom of the pipe, fit well into to top rim of the pot. Then covered the crack around the pot and storm collar with aluminum foul. Used an old t-shirt stuffed in the top around the stave to keep the heat in. Anyways the water that was left in the base when I was done was an extremely dark dark dark yellow. If it touched anything it was instantly osage colored. Still got half a jar of the stuff. Never thought about staining the handle leather with it.