Search found 47 matches: xrf

Searched query: xrf

by oel
Sun Mar 08, 2020 2:10 pm
Forum: Far East
Topic: Can anyone help, very large silver spoon
Replies: 10
Views: 786

Re: Can anyone help, very large silver spoon

... only. British provencial silver seen with maker' mark only. I agree acid test are unreliable and I suggest to have your spoon propely tested by xrf spectrometer. Peter.
by Aguest
Mon Feb 17, 2020 10:26 am
Forum: London Hallmarks
Topic: 17th C. Caudle Cup
Replies: 18
Views: 1596

Re: 17th C. Caudle Cup

... the same lion passant was used until March 27, 1697, then this cup could have been made by William Fleming, that's the more likely possibility, an XRF test could confirm sterling silver and it's just a very early piece from when he became free (1695) until March 27th 1697. Another record does list ...
by Aguest
Tue Jan 28, 2020 1:39 pm
Forum: Provincial & Colonial Marks
Topic: Dognose Teaspoons, Maker's Marks Only, SP
Replies: 5
Views: 453

Re: Dognose Teaspoons, Maker's Marks Only, SP

The other thing that you could determine is the metal content of the spoons. ::: With an XRF machine you would be able to know for sure if it is "Britannia Standard" or "Sterling Standard" so although that would be interesting, it might not help ...
by oel
Wed Nov 13, 2019 3:58 am
Forum: Other Countries
Topic: Need help identifying a pair of fighting roosters
Replies: 10
Views: 847

Re: Need help identifying a pair of fighting roosters

These fighting roosters could be made out of solid silver. Agree pseudo marks. I advise a proper silver test. use of XRF Alloy tester

Peter.
by samtron76df
Sun Jun 23, 2019 4:49 pm
Forum: Coin Silversmiths ~ American pre-1860
Topic: Coin Silver Spoon - mark "E pellet J"
Replies: 7
Views: 5347

Re: Coin Silver Spoon - mark "E pellet J"

this spoon xrf tested 91.8% silver... the plot thickens...
by SteveDWollongong
Thu Jun 20, 2019 10:42 pm
Forum: German, French, Dutch, Russian, Scandinavian or Other - Single Image
Topic: HELP please with ID
Replies: 4
Views: 6704

Re: HELP please with ID

... additional "Sterling" which I suspect was added for the market in which the item was sold, It would be interesting to have your piece XRF tested to see what grade of silver it is actually made from. Cheers, Steve
by steve7408
Wed Apr 10, 2019 2:20 pm
Forum: Coin Silversmiths ~ American pre-1860
Topic: 12 American Colonial Silver Buttons
Replies: 49
Views: 30097

Re: 12 American Colonial Silver Buttons

... vitally important. Link to Assay site- https://www.assayofficelondon.co.uk/other-services/laboratory-services It is a much more accurate way than XRF, even though XRF is a good test the surface can become enriched over time giving a false reading. A tiny 20mg sample is gently scraped from each ...
by samtron76df
Sun Mar 31, 2019 9:53 am
Forum: Coin Silversmiths ~ American pre-1860
Topic: coin silver spoon marked EXC
Replies: 9
Views: 5557

Re: coin silver spoon marked EXC

Had this spoon XRF tested and it came in at 89.8% silver. It was also hypothesized that the mark could read F&C with the X actually being a squashed ampersand. So this is coin silver from somewhere...
by Jazzman111
Tue Jan 22, 2019 4:15 pm
Forum: Silver Care / Techniques
Topic: Advice on best methods to test silver
Replies: 0
Views: 4022

Advice on best methods to test silver

... they distinguish, say, between .900 and .925 fine? Can they tell the difference between the latter and a silver plated surface? 2) I read about XRF spectrometers, but they look pretty expensive. Are there other methods that fall between the latter and acid testing? 3) Is there some reliable ...
by richard357fallon
Fri Oct 05, 2018 8:47 am
Forum: Far East
Topic: .500 Chinese Export Silver Nurse's Belt
Replies: 1
Views: 1600

.500 Chinese Export Silver Nurse's Belt

Chinese chop marks stamped 50 Assayed with the XRF on 6 different links and the buckle all hit right at 53% ag. I've seen smaller items marked 50 but never in person. I was hoping someone could tell me what era or any similar items they have seen ...
by goldquartz
Thu Jun 28, 2018 11:49 am
Forum: Mystery Objects
Topic: Whatever it is...... ..its a good one!!!!!
Replies: 12
Views: 7914

Re: Whatever it is...... ..its a good one!!!!!

I want the xrf app too!!

Thank you both for the great leads It is so much appreciated

And hope the other half turns up at the next estate sale :,,,,(

It really does look like the mark reads ROI so I will do my best to check into that
by Aguest
Tue Jun 26, 2018 3:51 pm
Forum: Mystery Objects
Topic: Whatever it is...... ..its a good one!!!!!
Replies: 12
Views: 7914

Re: Whatever it is...... ..its a good one!!!!!

... of French Silver ::: Here is a brief description taken from an authentic 15th century French Ring: "The ring has silver content of 96% by XRF and this is consistent with the high quality French silver standard of the 14th-15th century, known as 'argent-le-roy' (king's silver"). " ...
by Aguest
Thu Nov 16, 2017 6:16 pm
Forum: Coin Silversmiths ~ American pre-1860
Topic: Tiffany & Co - 550 Broadway
Replies: 4
Views: 3375

Re: Tiffany & Co - 550 Broadway

... consistent with "Sterling Silver" and not "Coin Silver?" To really know for sure, you could find someone who has an "XRF Testing Device" which is a hand-held scanner which tells you the exact level of Silver, and a coin silver composition from the 1850s would ...
by Italiansilver
Sun Nov 05, 2017 10:51 am
Forum: Other Countries
Topic: Bracia Hempel Sugar and Creamer Set
Replies: 10
Views: 2504

Re: Bracia Hempel Sugar and Creamer Set

Before XRF, I filed the bottom of the foot and did not hit base metal. And then I acid tested it. Seems to be solid silver. I'm not aware of any other methods I could use to confirm. Ah ok if you scratched the metal and then ...
by AG2012
Sun Nov 05, 2017 10:38 am
Forum: Other Countries
Topic: Bracia Hempel Sugar and Creamer Set
Replies: 10
Views: 2504

Re: Bracia Hempel Sugar and Creamer Set

... test the base material directly, for example, by grinding or sawing down into it, since non-destructive standard analysis with X-ray fluorescence (XRF) shows erroneously high silver content due to the increased concentrations at the surface. Using a measuring application which looks for a silver ...
by neurorocker
Sun Nov 05, 2017 10:24 am
Forum: Other Countries
Topic: Bracia Hempel Sugar and Creamer Set
Replies: 10
Views: 2504

Re: Bracia Hempel Sugar and Creamer Set

Before XRF, I filed the bottom of the foot and did not hit base metal. And then I acid tested it. Seems to be solid silver. I'm not aware of any other methods I could use to confirm.
by Italiansilver
Sun Nov 05, 2017 10:06 am
Forum: Other Countries
Topic: Bracia Hempel Sugar and Creamer Set
Replies: 10
Views: 2504

Re: Bracia Hempel Sugar and Creamer Set

neurorocker wrote: I took it to a professional today and they subjected it to XRF and it measured at around 93% silver. It is a busy piece, so it's possible I've missed purity marks somehow, but I don't believe so.

Hi
I think it is not the appropriate method...because it tests only surface, not the inner.
by neurorocker
Sat Nov 04, 2017 2:44 pm
Forum: Other Countries
Topic: Bracia Hempel Sugar and Creamer Set
Replies: 10
Views: 2504

Re: Bracia Hempel Sugar and Creamer Set

... for the replies! I too thought this should be tested in the absence of purity marks. I took it to a professional today and they subjected it to XRF and it measured at around 93% silver. It is a busy piece, so it's possible I've missed purity marks somehow, but I don't believe so. So, for at ...
by oel
Mon Sep 04, 2017 2:57 am
Forum: Silver Plate Trademarks - Single Image
Topic: M, fleur de lis, crown over C hallmark
Replies: 18
Views: 26303

Re: M, fleur de lis, crown over C hallmark

... silver nor coin silver but an non precious white base metal, silver plated. For silver test see: http://www.925-1000.com/forum/search.php?keywords=xrf&terms=all&author=&sc=1&sf=all&sr=posts&sk=t&sd=d&st=0&ch=300&t=0&submit=Search Oel.

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