Completely missed this post. Sorry!
I used iodized salt and followed the fairly terrible instructions on Dharma's site. Being new at the dyeing biz didn't help. ¯\_(ツ)_/¯
Yeah they aren't great instructions but they're OK. Definitely use plain salt or sea salt. I used sea salt the 1st time and plain Morton's salt the second.
These are the key points that I took note of (with my notes in bold italics):
1)
Pre-Wash your fabric. Use HOT water and 1/4 cup
Synthrapol or
Dharma Professional Textile Detergent (PTD) per machine load. (
Then don't touch the fabric with bare hands again)
2)
Dissolve your dye. Paste up the
Fiber Reactive Dye with some warm water, smashing it with a spoon (
I used a wide tongue depressor/popsicle stick in craft cups), like making gravy (
mine looked more like sludge, just make sure it's done in a disposable cup, and try to make sure no bits of dye are undissolved). Next, add about a cup of warm water (more if you are dissolving lots of dye, like with black) to the dye paste to make a well dissolved slurry. Finally, add to the tub or bucket (
already filled with the correct amount of water) and stir to mix evenly.
3)
Pour the required amount of the Non-Iodized Salt* into the dye bath. Add
Calsolene Oil(Optional—breaks surface tension for more even, less streaky results; highly recommended for large loads).
I used Calsolene Oil on mine, and I did 1/2 lb of fabric each time.
4)
Add your wet fabric. Stir gently, but frequently, for 20 minutes. In a washing machine, set it to agitate
(I stirred constantly for 20 min)
5)
Add the Soda Ash. Dissolve
Soda Ash with warm water and add slowly (
I think I used about 1.5 cups of warm water), over about 15 minutes, to the dye bath while stirring. Don't pour it directly onto the fabric (concentrated Soda Ash solution touching the fabric can leave darker splotches!)
(I stirred constantly for the 15 minutes, pulling the fabric to the side with my stirring spoon, then pouring in the soda ash mixture, and then stirred the water around before letting the fabric go back into that area)
6)
Rinse & wash out excess dye. Use cool running water until it runs almost clear, or put it through a couple of rinse cycles in the washing machine. Then wash in HOT water using
Synthrapol or
Professional Textile Detergent to finish washing out the excess dye. (
Used 1/4 cup again)
Then I let my fabric air-dry.
Paraphrased from
http://www.dharmatrading.com/techni...t-dye-method.html?lnav=techniques_tubdye.html