Re dyes I use
Prochem Washfast Acid Dyes (vinegar or citric acid for the acid)
I like them because once you mix them up, they are shelf-stable for six months (many dyes you have to use relatively soon once you mix them). The cost per pound to dye is very good on these too.
In an educational environment, having dyes that get mixed up staying stable for months could be an advantage and useful for minimizing costs and waste.
In a past life, I used these for production dyeing silk roving and selling, so I did a lot of research once upon a time on things like cost, color range, safety, required setup, etc and these came out ahead. Prochem’s Pro MX fiber reactive dyes came out well in research too. But the acid dyes fit what I needed at the time better.
Typically I’ve steam set these in an electric vegetable steamer. Hit the button, takes 45 minutes, can walk off and no babysitting. Steam setting is very gentle and doesn’t felt even very fussy delicate fibers since no agitation.
Only downside is capacity. I think I was doing around 4 ounces wool or silk a batch. There might be larger capacity steamers. To do more in a session, I used a couple steamers I ran simultaneously, or staggered running one with prepping next, etc. This methodology of multiple steamers or larger capacity if available could work fine logistically in a classroom setting. I found them at the thrift store for $7 on completely different trips (or $35ish new). Seems folks get these for gifts, never use, then eventually donate to thrift store
Obviously, since these are acid dyes, they’re only good for protein fibers (wool, silk, camelids, etc) and nylon.
I’ll be looking into fiber reactive dyes so we can also do cellulose fibers like cotton, bamboo, and linen as well. Plus the process and heat (or lack thereof) is different. They’ll dye cellulose at room temp, protein fibers set with heat.
I’m also going to look at jacquard acid dyes since they have good rep. I don’t know about shelf stability. I know they come in liquid too, but I found in general that that mixing master dyes from powder was better cost. Well, and I’m super familiar with the prochem ones and how they act.
For the most versatility, fiber reactive dye family might be the way to go since it’ll do everything. A little more complicated, but nothing insurmountable. I’ll have to compare costs.
One-shot dyes could be an option too, but they’re markedly more expensive. But way less complicated for the trade off (don’t require auxiliaries). Personally, it’s not that hard to do the rest, so I lean towards the ones mentioned above.
Full disclosure, haven’t dyed things like cotton fabric for quilting, so if you know that part…
I’m open to ideas and input. I have a feeling we have complementary dyeing knowledge. Might be good to coordinate since we’d use a lot of common things.
What have you used?