Wondering Wednesday : Keeping Dye

How long can you keep transfer dyes, once they have been made up into solution?  Well... the answer seems to be, indefinitely.  Providing, that is, that you keep them in a jar, preferably in a cool place.  I have even found that, if you let the dye dry out, you can add more water and redissolve the remains...but I think that's taking economy a little far!!  I keep my dye solutions in coffee jars (we drink rather a lot of coffee around here...).

The image is of a transfer dyed quilt entitled 'It's Coming To Get You!'.