G’day; this topic came up in the early days of Orchid and someone (I
can’t be bothered to check the archive) said what they did was to
place all their sweepings and scrap in a kiln and burn off all the
organic material (fluff, buff soap, common - and uncommon - dust
etc,) and melt the metal, casting it into a into a small ingot. They
would then drill two 3mm, shallow holes in it, and because the refiner
thought samples had been taken for assay (one for the owner, one for
the assayer) this might help keep the refiner honest. Bit like having
a very visible dummy TV camera in your shop, which is a hell of a lot
cheaper than a real one! Effective? Dunno. Interesting though. –
Cheers now,
John Burgess; @John_Burgess2 of Mapua Nelson NZ