community of dyers

With most Procion MX dyes, I can get a pretty good idea of how intense the final color will be by testing on a paper towel. Not true for Turquoise MX-G (or mixtures than include it.) I did a few tests to see if I could get a better idea of exactly how long it takes to get a dark turquoise.

This pic has the paper towel test, plus four swatches dyed with super-concentrated turquoise(3 1/2 Tbsp dye powder /1 Cup water). The swatch is very thin--an old cotton sheet. The top-left swatch was left to react for 4 hours at around 80 degrees. Same for the top-right swatch, except that it was microwaved until steaming near the beginning of the four hours. The bottom-left was let sit for 16 hours, no heat. Again, same for the bottom-right except that it was microwaved near the beginning of the 16 hours.
From Turquoise Experiments

The second test for for immersion dyeing. I thought that, given enough time, the swatch would become at least as intense as the paper towel because the dye molecules would be free to move around until they could react with the fabric. I microwaved this and let it sit for about 16 hours.
From Turquoise Experiments

I was surprised at how light this came out. I've done immersion dyeing of white jeans using turquoise mx-g that came out much darker than a paper towel dipped in the dye bath. That was at room temperature for about 16 hours. I'm not sure if the difference was the weight of the fabric or if the high heat would have caused the dye to react to the water before it could react with the fibers.