When I rinsed them afterwards there was a little more color in the water than normal, but they rinsed clean after a couple times. I don't think any true color was washed away. The colors were not as varied as I'd hoped. They pretty much did their own thing together, but pretty anyway. I think I will try carding them with some of the flash I got a couple months ago. We'll see what turns out. I do like the colors they both ended up ... fluorescent pink and electric blue, and a light lime green and soft royal blue. The computer really doesn't do them justice.