www.925-1000.com

Hello,
I was wondering if anyone knows about De Hoog Silver smith. The item I have is stamped 90, De Hoog and the letter B.
The piece has been x-rayed and is solid silver and not silver plate.
Any information about the maker or country would be great.





Thanks Tristan

I've never heard about the test of silver with x-rays.
Some time ago someone told me about an electronic tester for silver, but the dealers for goldsmiths and silversmiths who I contacted did not know anything.
Does anyone have information on the matter?
Thanks
Amena

Try a search for x ray fluorescence testing. But it can be quite expensive if you have to use the services of a scientific laboratory.

Hi Amena,

Please read and see links;
http://www.925-1000.com/forum/viewtopic.php?f=8&t=27186" onclick="window.open(this.href);return false;"
X-ray can reveal if an item is plated but does say nothing about the base material used; precious or non precious metal, so X-ray always in combination with a silver test (acid test or other method).

Oel

Thanks to both
Thus this test verifies only the composition of the surface layer, and therefore does not guarantee that the object of kiwichef is made of solid silver

X-ray’s able us to ‘look’ inside a metal object and if plated we discover a ‘skin’ hiding the base metal, if not plated we look at the solid base metal and perhaps discover hollows but the X-ray does not tell us anything about the sort of alloy/metals used . To determine precious or non- precious we have to perform other test, like the Specific Gravity method or acid tests.

Oel

If an item is not plated x ray fluorescence testing will actually reveal what the composition of the alloy is. It can also revea if the object is plated but as Oel says I think it probably cannot analyse the metal beteneath a layer of plate.

Hi Agphile,

Yes, a ‘simple’ X-ray/scan could reveal if an item is plated. A high-tech X-Ray Fluorescence Spectrometry (XRF) for compositions of precious metal alloys only reliable if done &“read”by experts.
http://www.hallmarking.com/hallmarking/assaying" onclick="window.open(this.href);return false;"

Best,

Oel.