I have always suspected this...

And it is why I only have a basic black and white Laserjet at home. I also have very strict rules about how much it can be used and when. I know I will soon have to break down and buy a color printer for the kids and their homework projects, but I am holding out as long as I can. After all, I really like Veuve Clicquot, GH Mumm, Piper Heidsieck, et al.