Its always 42!!
42 is also the angle at which we see rainbows!!! Coincidence? I think knot! (only if it were true that would be awesome)
It's like a Tootsie pop man, The world may never know.I am tempted to test it and find out how many times a dye is good for. But then you'd have to try it with several different dyes to see if it's a set amount or if they have different sets of "charges". Then again, nah, I'll never do it.