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Well, the McCreight instructions call for fluxing the channels, and
grinding the niello in water, then gently dried. The fusing process
shouldn't take the niello past 540 C (1000F), and needs to be pretty
uniform. Spot heating doesn't really seem to work very well. If the
metal gets hotter than that, then you will have the problem of the
lead content eating into the silver. Often it doesn't actually flow,
and has to be helped along with a spreader. I think your mixing the
ammonia chloride with the niello, probably didn't help matters.
Ron Charlotte -- Gainesville, FL
ronch2 AT bellsouth.net OR afn03234 AT afn.org
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