Lots of trouble over the years specifically (only) with 18kt red gold.
Lots of little things I have heard, and I throughly everything at it and get decent results. Sometimes I get a fracture and make two pieces of plate or wire intead of one.
All said here already, but
Don’t keep the heat...
I use a Lindsay for most of my work, but I will attest that it is not complicated to "tune" the GRS unit.. and once I've got it it is pretty much stable. The Lindsay actually requires more fiddling as you go along, nonetheless I prefer it for most basic engraving.
I'm not sure im contesting...
https://www.sunwardhobbies.ca/008-phos-bronze-sheet-ks-engineering-16053/?gclid=EAIaIQobChMI0fXrmsKg8QIVchitBh3j8g5ZEAsYAiABEgK-B_D_BwE
Your other source would be the suppliers for bronze casting in your city. But bronze is less commonly provided in sheet form. Not sure if the link I put will...
Take what I say with a pound of salt, because I haven't sandblasted engraved work.. I have done some sandblasting preparing large bronze castings for patina and on glass.
Caveat out of the way.
Strikes me, that if you are going to French grey, and your canvas is already level and clean...
I engrave/recurve all my cast stuff.. it does not have the density of milled metal.. i chase everything.. front and back if possible.. that will tighten it up considerably.. you should also hunt an y voids or pits and lay in a bit of weld ... you can smooth it all down after... or...
Krugerands, i think you mean, are 22kt .... that may be the issue you have had with your alloy.
I did not reverse the hardnesses on 14 and 18. That is the information as I received it from the smelter... maybe they gave it to me wrong, but I don’t think so as that was the precise subject of...
I don’t know what experience you have working with these materials..
Logically, gold being softer you would expect that the less alloy you have in with your gold the softer it will be..
you would think, but there is also chemistry at play here..
I work almost exclusively with 18 and 22 kt...
I have bought a few to hook on to my cannon g9, and my Sony a7sii. No luck either way and have become dreams deferred.. I think there is something that happens with the optics that needs to be dealt with.. I’m hooking up to an m3z, and an mz6 (Leica/wild) tho
In pic one and two you can see a little dado along one side of the box. A piece of plywood slips in there to allow for a tray that pulls out a bit. I don’t really use it. It would be better on the other side to bridge the cutaway when the box is in transport.
Pic three you can see the...