[ATTACH] [ATTACH] [ATTACH] As some of you know I collect contemporary counterfeits. SEM/EDS analyzes all the elements in the periodic table....
I ship all over the world. If its over $100 I register it ... I charge $3.50 regular and $7.50 registered and $17.50 for Europe. $20 to Australia...
BAJJERFAN - the sodium is not important its just the chloride and sulfur reacting with the silver. Like I told desert gem its round and round with...
For people that test coins with SEM/EDS weekly like myself in the lab almost all contain sulfur and chlorine on the coin's surface. W. Weimer...
Mike - no need for an XRF analysis verification on this nickel! WOW! LOL! John Lorenzo Numismatist United States
Desertgem - I did confirm that normally HCL dip is used and this is standard practice for treating silver making it non-corrosive to airborne...
Excellent! Read "Micro-Raman Characteristics of Silver Corrosion Products: Instrumental Set-Up and Reference Database by Irene Martina. It can be...
Desertgem ... I have the answer. All the information you need to answer this white milk spot dilemma has been presented. It was Bron's thread from...
I have indirectly bumped into this phenomenon. Can someone send me a RAW sample for SEM/EDS verification. It's "UNQUESTIONABLY" from the...
Its real easy to lose it on this forum. JPL
Just to be accurate the Blakesley Effect is not 100% present on all clips for some reason. I have seen papers and proof on this but certainly with...
http://www.error-ref.com/blanking-and-cutting-errors/ See #5 Edge clips are this small ... I would view the flow line diagnostics at the...
A very light clip like on a Morgan Dollar that we see sometimes being auction off at like Heritage ... could be post mint damage - but I doubt it....
A numismatist's level of coin making and knowing when to expect flow lines in those broken areas is KEY. I am leaning to Blakesley Effect. Note...
I did develop my own coin cleaner for high end copper based on chemicals in the lab and based on what worked with the original Coin Care which is...
Right now I am studying the surface chemistry of Contemporary Circulating Counterfeits of Mexican Cap and Rays whereupon the silver has been...
Lehigh let me check my library. Since the historical and counterfeit coins I collect - I really do not study in depth - the topic of toning. I...
As maybe some of you know I have been using XRF and SEM/EDS analysis for several years now - I do like some of the comments and that rainbow chart...
So what are you going to do to correct the problem? JPL Nothing you or I can do - hence trivial.
I am dangerous ... JPL
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