This week’s Mordant Monday focuses on Gallo Tannin, also known as Oak Gall tannin, or Oak Galls. We used the extract made from Oak Galls in our gradation, but a similar result comes from oak galls that have been crushed or pulverized. Gallo Tannin is one of the ancient tannins with many uses, including making black ink, leather tanning, and in traditional Asian medicine. It is the most commonly used tannin when mordanting with tannin + alum, as the color it imparts is very light, and it doesn’t show a strong undertone, like sumac or walnut or other tannins with … Read more

For Mordant Monday, we answer your Mordant Questions and dive into everyone’s favorite topic: MORDANTS. Are you Mordant Curious? I received a great question about the mordants we carry. Like, you have so many. What is the difference? Does it really matter? Having a variety of mordant choices allows you as an artist to consider your materials before you start creating. For example: if you are dyeing a cellulose fabric, you can use aluminum acetate, or you can use a tannin pre-mordant and then apply aluminum sulfate as the mordant. They will give you different results. We’ve created a table … Read more

Taking a little time to work more closely with tannins has been incredibly interesting! This week’s tannin exploration focuses on Sumac. Sumac is from the Rhus genus and its scientific name is Rhus coriaria. It’s native to southern Europe and western Asia where it is commonly known as Tanner’s Sumac or Sicilian Sumac. We are fortunate to have number of North American native sumac including Rhus glaubra, sometimes called Smooth Sumac, and Rhus typhina or Staghorn Sumac, known for its dramatic bright red berry clusters. The staghorn berries were used by indigenous people as a tea, and the bark, branches, … Read more

Black Walnut Juglans nigra is one of our most interesting tannins and it’s a color that’s native to the North American continent. The entire tree contains color but it is in the green hulls that we find a strong concentration of dark tannins yield light beige to golden brown on cellulose. On wool, black walnut really shines and makes a rich brown shade. Walnut Hull Powder from black walnut (Juglans nigra) is a common source of brown dye throughout North America. The fleshy hulls are full of tannin, juglone and other pigments and are the primary source of the dye. … Read more