Originally Posted by
williamwaco
Chevroner
Asking questions like that is the primary purpose of this board. Never apologize for an honest question.
Destructive:
It is very hygroscopic. It absorbs moisture out of the air and forms a crusty film on the surface of everything it touches. It will cause severe rusting of your pot, your molds, and any other iron objects it comes in contact with.
Dangerous: This crusty film contains WATER. It will form on your stirring and skimming spoon and when it cools will absorb water from the air. Then when you put your spoon back into the pot to stir or skin, you get a nasty surprise.
Don't ask me how I know.
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Well!
I am having second thoughts.
It has been many years since I used it and the description on the Brownellls website seems to dispute my claims.
Quote:
Non-Smoking Non-Fuming Odorless Flux
Far and away the most popular - and successful - bullet casting flux, MARVELUX has been on the market since 1971 filling the needs of knowledgeable and successful professional and hobbyist bullet casters. MARVELUX is non-corrosive to iron and steel, and does not produce fumes which can cause corrosion, as does sal-ammoniac (ammonium chloride). In fact, regular use will keep your pot free from rust! Reduces dross formation dramatically while increasing fluidity of bullet alloys, making it easier to obtain well filled-out bullets.
Some of you old timers chime in here. What flux am I remembering having the trouble with?