The fabric is Nana's pantry by Connecting Threads.
11/18/13 edited to add: it has come to my attention that vinegar is NOT recommended for this process. It could cause a reaction that could be harmful to you. Apparently the vinegar bath will not stop the reaction to the bleach and your fabric will eventually deteriorate. Please see the updated instructions below. I apologize for the mis-information. If you want to read more on the subject, please read through this page. If you have completed a project with the technique I shared, I'd recommend that you rinse your project thoroughly in a mixture of Anti-chlor and water to stop the bleach reaction on your fabric.
Household bleach-regular or ultra
Tongs or gloves
Anti-chlor (can be ordered through dye suppliers)
3 ice cream buckets or large containers
Prep your fabric. I started with a fat quarter of each fabric and cut them in half to yield fat eighths. Set one piece of each fabric aside (control) and use one piece of each fabric for the bleach treatment.
Fill an ice cream bucket 3/4 full of water, then add 1/2 teaspoon of anti-chlor. Mix to dissolve.
Fill the third bucket with plain warm water.
Take a piece of fabric and place it in the bleach water. Use tongs or gloves to swirl the fabric around for a short time....start with only 10-15 seconds....then take it out. Let it drip just a bit, then place it immediately into the anti-chlor and water mixture.
I hope you give this technique a try. It was SO MUCH FUN to experiment and play. I was seriously giddy, and that was in spite of (not because of) the bleach fumes. Speaking of which, ventilation is a good idea.
If you have any questions, I'll try to answer them in the comments.