Last Saturday, I used artificial sinew to tie my folds. I also used immersion dying for the first time, per the instructions in Tie Die to Dye for.
I did not soak the shirts in soda ash.
I used 1 cup of kosher salt /gallon of water, with 2 TSB dye/gallon water, (forest green), and let soak over night. The recipe calls for non-iodized salt, and I believe kosher salt is non-iodized. That's all I used.
The results were horrible. I have 4 green shirts, not forest green, but more of a Army green. That's not the worse part, for some reason, there is virtually no contrast from the folds; if you look really really close in bright bright light, you can kinda sorta tell there are lighter bands of green
Did you add soda ash to the dyebath? How many minutes after you added the dye? The recipe in
Tie Dye to Dye For and Batik You Can't Resist says to add the soda ash after half an hour of soaking the fabric in the dye. Is that what you did? If you omitted the soda ash altogether, a disaster would have been inevitable.
Soaking in dye overnight lets the dye creep as far as it can through the garment, which tends to reduce contrasts to a minimum. Sometimes the ties will be tight enough to exclude all dye, sometimes they won't. If you want strong contrasts, I don't recommend that recipe. Instead, try
low water immersion dyeing, or stick to the direct application of dye, as in tie-dyeing. High water immersion dyeing (that is, dyeing with a high ratio of water to fabric) is best for dyeing solid colors in untied fabric or clothing.
I have not found
Tie Dye to Dye For and Batik You Can't Resist to be a particularly reliable book. Books by Elin Noble, Ann Johnston, and even the very inexpensive books by Sulfiati Harris are more instructive.
Paula