Once your fabric is rubberbanded, start the washing machine. I set mine for a SMALL load on the hottest cycle. How much bleach you use is a matter of preference. For this fabric I used half a bottle! Use less if you would like a more subtle pattern. After the machine has a good amount of water, add your bleach and then your fabric, then leave the fabric to soak in the bleach/water mixture. Again, how long you leave the fabric is up to you. I left this fabric to soak for four hours. Once the fabric is almost where you want it, start the machine back up and let it finish the cycle. Remember, the finished product will be a bit lighter than it looks at this point!
After the cycle has completed, cut out the rubberbands and wash the fabric once more. Using hot water, wash it with your favorite laundry detergent and a good quality fabric softener.
With any luck your fabric will look something like this. Now make something with it!