Thank you, yes I dyed the 100% cotton t-shirt with Procion MX dye, I believe I used deep navy from Pro-Chemical. I actually did this some time ago when I first got the AC books so not positive on the color. I soaked the fabric in soda ash solution then squished the whole thing into a Ziploc bag with the dye. The more often you manipulate the fabric in the bag the more evenly distributed the dye becomes in the fabric. I let it set for at least 18-20 hours in the bag - blues tend to take more time to batch. Then did washout, then the stenciling, cut out pattern, and did all the stitching as you normally would. Any other questions just ask I have done a lot of dyeing.