Soda ash mix:
3 tbsp dissolved in 1 cup warm water
Dye mixes (Turquoise, Fuchsia, Yellow) :
1.5 tsp dye dissolved in 1/2 cup water
Sunshine 100% cotton from Len’s Mill Store, washed & dried. Cut into 15″ square pieces, roughly.
For each piece of fabric:
2 tbsp soda mix
3 tsp dye, total
Each pair of dyes was tested in a range of ratios: 1:5, 2:4, 3:3, 4:2, 5:1.