I then cut out my image (this one is slightly different because it was my test image) and placed it where I wanted it to appear on the shirt:
Then you iron the freezer paper, waxy side down, onto the shirt.
I then took my project outside so I wouldn't get bleach all over random things in my house. I also changed my clothes, make sure you wear something that you won't mind a few bleach spots on in case some happens to blow your way.
I slid a piece of cardboard inside the shirt so the bleach wouldn't leak through to the other side of the shirt:
I put a 50/50 bleach/water solution in an old hairspray bottle (after I rinsed it our thoroughly) and started spraying the area of the shirt I wanted to concentrate on:
I had to be patient (which I hate!), the bleach took a few minutes to start changing the color on the shirt. I re-misted it a few times to get the concentration that I wanted.
Once it was almost dry I peeled off the freezer paper.
And my test shirt looked like this:
Here is my daughter modeling her finished shirt:
(I made these in October-- no I don't make my kids wear long sleeve shirts in the summer!)
If you want to do something basic this should give you some idea of how to do it, the ultimate tutorial can be found here.