Search found 43 matches: xrf

Searched query: xrf

by samtron76df
Sun Jun 23, 2019 4:49 pm
Forum: Coin Silversmiths ~ American pre-1860
Topic: Coin Silver Spoon - mark "E pellet J"
Replies: 8
Views: 2047

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: 1716

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: 44
Views: 20072

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: 2297

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: 1633

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: 1319

.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: 4399

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: 4399

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: 2863

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: 1976

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: 1976

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: 1976

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: 1976

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: 1976

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: 21133

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.
by dragonflywink
Thu Sep 29, 2016 12:47 pm
Forum: Sterling Manufacturers ~ American after-1860
Topic: 1860s Gorham sterling silver bud vase with cherubs
Replies: 24
Views: 5505

Re: 1860s Gorham sterling silver bud vase with cherubs

Not a fan of acid testing either - if you feel a need to know the fineness, find someone who will use an XRF spectrometer, non-invasive and more accurate...

~Cheryl
by kamxsd
Tue Jun 21, 2016 3:26 pm
Forum: Gold - Single Image
Topic: Markings inside of 18k Gold Ring ?
Replies: 10
Views: 4929

Re: Markings inside of 18k Gold Ring ?

Good point. I have not done any acid test. I was going to buy the kit but instead I will drive to a place where they have a handheld xrf machine. Will let you know the results tomorrow. Hello! This remind me the hundreds of copper rings, what I saw in my carrier with fake "marks". ...
by neurorocker
Tue Dec 29, 2015 11:42 pm
Forum: French Silver
Topic: Need Your Eyes on an 18th Century French Object
Replies: 6
Views: 2919

Re: Need Your Eyes on an 18th Century French Object

Old post, but maybe worth a follow up.. I subjected this item to XRF today, and Acapulco was correct. The item is not silver, but pewter. The primary metal constituent was lead.
by neurorocker
Tue Oct 06, 2015 11:36 am
Forum: Flatware Pattern Identification
Topic: Elegant Acid Etched Gilded Knives 850 Silver
Replies: 3
Views: 1271

Elegant Acid Etched Gilded Knives 850 Silver

For your consideration, a set of six unmarked silver table knives (I searched extensively for a mark and found none). These were tested with XRF, and the handles are precisely 850 silver. Blades are gilded iron alloy with zinc. The knife handles are nicely embellished with shell and thread, ...

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