Here's what I picked :
Here they are side-by-side for easier comparison.
This one is a close-up comparing the 2 versions.
Here are the fat quarters side-by-side for easier comparison.
Here's a close-up comparison of the 2 blues.
It's very clear that you can get different effects according to when you add the soda ash.
This is swatch 1-7-2 from the Naturals set. Again, I liked the veining.
I tried this one on a 1/2-yard piece of dry fabric and got this :
In the meantime, the Earthy Triad is batching as I speak. Can't wait to see how those gorgeous, rich colors turn out!