Page 43 - Bullion World Issue 1 May 2021
P. 43
Bullion World | Issue 01 | May 2021
The blanched silver coin shown in Fig.1 blanched silver, “silver on silver/copper”, the substrate and the thickness of the
was made from a 625 silver alloy (i.e. a concentration of 61.4% is obtained, covering layers of both silver-plated
62.5% nominal silver content). A simple which is very close to the nominal and blanched silverware – quickly,
material analysis using XRF would silver content. To verify the results, accurately and non-destructively. Your
show a silver content of 85%, a value this coin was then cut in half, allowing local FISCHER representative will be glad
significantly greater than the nominal direct measurements in the cross- to answer additional questions you may
silver content. have.
Fig. 2 shows how the silver content section using an XDV-μ instrument with
increases as a function of the an extremely small spot size due to a Mr. Bharat Patil
closeness to the coin surface, where focusing optics. National Sales Manager
the silver concentration approaches
100%. Using the GOLDSCOPE Using specialized applications with Email : bharat@fischerindia.com
SD® 520 and an application created the GOLDSCOPE SD® 520 makes it Mobile : +91 9724312808
specifically for the measurement of possible to determine the fineness of
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