Re 上市 Deposited
XRF at C4
- From CopperClem@attbi.com Wed Nov 06 11:05:29 2002
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Date: Wed, 06 Nov 2002 19:05:28 -0000
To: colonial-coins@yahoogroups.com
Subject: Re: XRF at C4
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From: "Clement V. Schettino (Clem)" <CopperClem@attbi.com>
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Hey Mike,
Just exactly what do you mean by "clean"? I typically degrease/clean
all my coppers with xylol (sp) then apply either "care" or "blue
ribbon" to return a little life, then remove most of the care or BR
leaving a fine coating behind for protection. Is that clean or should
one remove that protective coating, once again applying xylol (sp),
before subjecting to XRF?
Thanks,
Clem
--- In colonial-coins@y..., "mike468hodder" <mhodder@t...> wrote:
> When you test your coins at C4 using XRF, be sure to take multiple
> readings on each coin, at different spots. Also, be sure the points
> tested are clean. With coppers made of three or more different
> elements segregation/surface enrichment can be problems.
>
> Just a word to the wise.
>
> Mike H - 2002-11-06
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