Originally Posted by
ps_bond
Several of the questions are "it depends..."
One caster I use (Jewellery Casting Scotland) have a minimum charge for 1-5 items, so it makes less sense to send them less than 5. Others don't (but if you're just casting in Pt, it might be more of an issue)
Every caster I've used has preferred to sprue pieces themselves, although you can multi-sprue parts (so a small sprue with a couple of settings on it, for example). Others will set up a multi sprue for you.
You can have a master cast, finish it (or have the caster finish it) and have a mould made of it; remember that there is shrinkage from wax to casting and then subsequent shrinkage from the 2nd generation waxes to castings.
Yes, different size rings need different size masters. You could make the master so it's easy to resize - if you look at stamped signet ring blanks, for example, they're available flat & you bend up the shank & solder to size. I wouldn't go that far with a casting, but there's usually some latitude in how far you can move it.
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