This is the dye stuff that is easily available, as far as I know it just gets thrown away, so why not try to make a dye, I thought. And I did. Usual approach, boiled carrot tops in water about 20 min, left it to soak overnight, strained, added alum. The lighter color took about 20 min, the darker was left there for about 20 hrs.
This dye spoils very fast, but if you can get it for free and if you like that kind of canary yellow – why not try?
I don’t know yet how it will handle the light, I guess we’ll see.