Wheat bran is often used as mordant assist with aluminum acetate. It contains minerals that help enhance the aluminum acetate mordant and brighten dye colors.  Wheat bran baths can be used several times before discarding. Their enzymes are also useful to remove starch from fibers.

Wheat bran is the outer layer (pericarp) of the wheat kernel. It is the part that gets removed when processing wheat grains into white flour. Bran is high in fiber for dietary purposes but provides a different function altogether when used for mordanting.

A note for gluten allergies:

Wheat bran is not recommended for those with wheat gluten sensitivities or allergies. Our gluten-sensitive friends have reported no problems but everyone has a different tolerance level. Calcium carbonate also makes a good aluminum acetate mordant assist and does not contain gluten. 

250gm/package