Tannic Acid

Description

Water soluble tannin for cotton mordanting and black.  Also used as a beige base for block printing with an iron solution.

Use at 20 to 25% by weight of fabric.  A cold soak overnight, with a few stirrings, is usually adequate to impart a good beige base to any natural textile fiber.  In cotton dyework, a combination of alum mordant with a tannin base gives the richest and most permanent colours.