My friend Gaerwen had weld leaves to give away a few weeks ago but I only wanted some seeds. I ended up with a huge bag of stalks, which she says may have some colour. We shall see.
Dyeing falls firmly into the category of UFOs (unfinished objects), for which I have started a little support group on Facebook. In this case, it also falls into the category of “things I really must learn to do while following instructions”.
I used the instructions from here with 50 gr of weld, soaked for two days and simmered for two hours. I was fairly certain I wasn’t going to get much colour, and didn’t have ready access to proper chalk, so it seemed wise to do the maximum things from the beginning. After it had cooled, I decided it still wasn’t great, so I dumped in a whole bunch more weld stalks (plus bits of dried leaf), and boiled it for another hourth
I used a mystery roving from my stash (possibly a blue-faced Leicester?). When it came to mordant, I was fairly certain I had alum in the house, but it wasn’t with my spices so bought more. As I was scooping it into a bag, I had a flash-back to buying a large bag of it years ago, from the same grocery chain, but at the far end of the city. At least I only bought a little this time. Add “get all the dye-stuffs together in one place” to my list of unfinished projects! The mordanting instructions I used were for a pound of wool, and I have only 50 gr. That meant lots of complicated math for the amount of alum and cream of tartar. I think it works out to about 3 tsp of alum and 1 tsp of cream of tartar. I simmered the wool in my mordant water for an hour, then let it cool overnight. I then added it to my weld water, simmered it for another hour, and let it it overnight again. After simmering, I was fairly certain this was not going to be a brilliant success. Sure enough: this is the final result now that it is almost dry. It is definitely more yellow than what I started with, but not sufficiently yellow that I will bother with the remaining stalks. Maybe. I suppose I could try another bath and do an overdye.