Re:How's it work? (Score 1)

Yah. Just because you can't see doesn't mean it isnt' there. I hope the dyes are nontoxic. The method you describe is undoubtedly what is being done. I have another example from the world of biochemistry. The most widely used protein dye, Coomassie blue, can be "disappeared" using a bit of the reductant sodium borohydride. It was most amazing to see a heavy solution of dark stain-your-pants-forever dye go aquarium clear in a few seconds.