Madder is isolated from the roots of Rubia tinctorum. A wide range of reds can be obtained from this dye by changing the pH and temperatures.
Madder prefers hard water, therefore the addition of a Tum’s© per gallon of dyebath will promote the richness of the resulting reds. For the brightest reds do not let the temperature of the water get above 140°F (60°C). A short dip with mordanted fiber in the beginning will pull much of the yellow dye out, leaving the reds for a second fiber bath. Raising the temperature too much will result in the brown dyes being extracted and will dull the color. Heat powder for an hour before adding mordanted fiber, and then hold at temperature for an additional 2 hours.
Sold in 2 ounce bags.