I was reading the chapter on mordants in the book Craft of the Dyer: Colour from Plants and Lichens (by Karen leigh Casselman, 2nd ed., Dover Publications, 1993), when I came across this: “Some dye plants are used in the pot as mordants. This is true with alder and with sumac leaves.” (p. 40). (In case you’re not familiar with the term, a mordant is a substance used to help fix dyes in the cloth; a mordant helps make the dye color more light-fast, and helps the color stand up to washing better.)
This summer, I got interested in hammer dyeing (also known as “plant pounding”). This process transfers plant colors to cloth by hammering the plant against the cloth (details on the process are in this blog post). One problem with hammer dyeing is that the colors are not always lightfast, and may not stand up well to washing. But if sumac leaves can act as both mordant and dye-stuff, I wondered if they might produce a more permanent color if used for hammer-dyeing.
So I hammer-dyed a t-shirt using sumac leaves. And yes, they did indeed stand up to washing. As for lightfastness, only time will tell.
To see photos and a description of the whole process, scroll down.
Continue reading “Hammer dyeing with sumac leaves”