Rhodamine 6g, 25gIt is inexpensive, safe to use and a little goes a long way It can be diluted in methanol or other similar solvent, or in water Can be used on metal, glass, leather, plastic and other surfaces Unmixed Rhodamine 6G has an indefinite shelf life as long as it is kept dry and stored in a dark bottle Mixed solution has a shelf life of roughly one year and should be stored in a fume hood or flammable liquids cabinet