I'd try to avoid used kitty litter though.
:rotf
If it has been used / recycled, then I would certainly avoid it too. However, since in it's out of the bag form, it is no more than clay and it works like a charm.
Bob, Ya gotta try it some time!
In fact, knowing you, I would bet a nickle against a hole in doughnut that you already use it.
FWIW: And I certainly don't want to get off the subject here.....
However, for the folks that still have a lot of doubt about the use of simple kitty litter, and
if you're still interested in getting a good flux, and pouring a really good projectile, you might want to Google up Glenn Fritzell of IHMSA cast boolit fame, who can give a great technical reason on how & why it works so well.
Unfortunately I don't have that link handy.
Also it's important to know why you need a good flux. Is it for binding alloys, or separating / un-binding certain alloys?
Do you know if you are using
pure lead.... which is
extremely hard to find, or are you using "pure lead" from the junk yard (which is seldom pure) or perhaps a mixture of alloys such as found in common wheel weights?
Or, which is the case most of the time, or are you just fluxing because someone said that is what you're supposed to do???
You can easily get by without knowing any of this, but if you want to cast the best boolit possible then you may want to look a little deeper into this subject....it is a wonderful hobby, all in its own, and it does add a certain little something to the fact that you know,
and made, what your shooting.
Uncle Russ...