Originally Posted by Rachelrose
Interesting idea. I've yet to work with bleach on cardstock but am keen to try. How much control do you have over the shape of the bleached area. or does it just wick outwards? The technique I've seen uses embossing to contain the bleached areas, which can then be colored in with Prismas. So you can get pale colors on a dark background.
Surprisingly, I've not had it wick much at all. The key, I suppose, is to just use a slightly damp Q-tip, not dripping wet. The easiest way to see what will happen with your particular cardstock is just to play with some scraps. I think you might be surprised. You can also use a heat gun to speed up the bleaching/drying.
Something kind of cool is that on really dark colors, it might take more than one application of the bleach to go all the way white. But if you want to stop somewhere in the middle, you can. For example, Night of Navy will go through a pink stage somewhere in the middle. I've gotten some pretty cards that way.