If that would work i have an extra thing you could work out. If you use white baking soda and then use Cyan, magenta and yellow cyanoacrylate (if you can color it). Then you could get full color prints if you can mix those (or just close next to each other if it dries to fast, the look on a distance will be the same and hopefully they would mix a little bit). This would be easier then using colorby roeland22896 - Let's design something! (I've got an idea ...)