The precise identification of this natural dye is a little unclear. We found two somewhat different takes on this pigment code. From Artiscreation we found that Myrobalan is a dye that is used in India. It is made from the Terminalia chebula fruits/nuts. It is used as a mordant as well as a dye and produces a yellowish color, though Natural Palettes shows the results as brown. Sasha Duerr describes it as a "strong dye...an important dye and mordant, as the strength of its tannins can help to stabilize other dyes on a variety of fibers."
Interestingly, Kremer pigments lists their Oak Apples as NBr6. As far as we can tell these are different substances. Oak galls have some things in common with Myrobalan, such as high levels of tannin, but they are different.
