To dye the fabric:
Step one: Prepare fabric for dying by washing and drying.
Step two: Cut denim into a 12″ x 22″ rectangle.
Step three: Lay out a large sheet of cardboard or some kind of protective covering to your work surface (where you will be dying your fabric).
Step four: Prepare dye by doing the following: Bring 8 cups of water to a boil and add 3 tablespoons of soda ash and 1/4 cup of salt. Stir until fully dissolved. Add 2 cups of the water / soda ash / salt mixture to the large mason jar. Put on face mask while adding 1/2 teaspoon of the dye to the jar. Screw on lid tightly and shake well. Pour dye mixture into your shallow container. Disposable tupperware (like Ziplock brand) works great for this. I used an old cottage cheese container.
Step 5: Put on rubber gloves. Fold fabric in half vertically / hot dog style. Fold one corner of your doubled fabric over (like in the photos) and roll the fabric into a point. Dip the point of the fold into the dye for about 10-15 seconds to let dye absorb. Do a similar fold on another are of the fabric and dip in dye. You can try different combinations of folding and rolling areas of the fabric until you have a pattern you like, but always make sure the rectangle of fabric is folded in half vertically / hot dog style before you fold or roll further. This ensures that your pattern will be symmetrical… like an ink blot 🙂
Step 6: Unfold fabric and lay flat on cardboard. Some of your shapes may be a little geometric, depending on how you folded, rolled, and dipped your fabric. You can change the edges of the shapes to your preference by dipping paintbrush into the dye and painting the fabric with it. Just make sure to saturate the painted areas fairly well or these areas will end up lighter than the dipped areas. Using the paintbrush is also a good way to make your design more symmetrical. Allow to air dry for 24 yours.
Step 7: Throw your fabric in the washing machine. Add a few tablespoons of blue dawn liquid dishsoap to the load. Wash on a cold cycle. When cold cycle is over wash on a hot cycle. You can also use cold and hot water rinses in your sink, but using the washing machine is easier.
Step 8: Allow to air dry. Iron fabric on high heat.