[SEL] Finding ground off serial numbers

[peter ogborne]

Yes Peter ,on reflection you would be correct .Trying to cast my mind back 
to my NDT days ....we need a forensic investigator!
----- Original Message ----- 
From: "Peter Scales" <peter at loud-n-clear.net>
To: "'The SEL email discussion list'" <sel at lists.stationary-engine.com>
Sent: Friday, November 07, 2008 6:48 AM
Subject: Re: [SEL] Finding ground off serial numbers


> Hi Peter
>
> I'd guess and say that it wouldn't - hard-stamping of serial numbers 
> deforms
> the grain of the metal, rather than fracturing it.  Dye pen needs a 
> fracture
> or surface-breaking discontinuity to work.  It gets dragged into cracks by
> capillary action, like tea goes up a sugar lump :)
>
> All the best
>
>     Pete
> -- 
> Peter Scales
>
>> -----Original Message-----
>> From: sel-bounces at lists.stationary-engine.com
>> [mailto:sel-bounces at lists.stationary-engine.com] On Behalf Of
>> peter ogborne
>> Sent: 06 November 2008 21:27
>> To: The SEL email discussion list
>> Subject: Re: [SEL] Finding ground off serial numbers
>>
>> Peter ,just wondering how a dye penetrant would go.
>> ----- Original Message ----- 
>> From: "Peter Lowe" <plowe at exemail.com.au>
>> To: "ATIS" <sel at lists.stationary-engine.com>; "Oldengine.org"
>> <stationary-engine at oldengine.org>
>> Sent: Thursday, November 06, 2008 7:02 PM
>> Subject: [SEL] Finding ground off serial numbers
>>
>>
>> > Hi Guys
>> >
>> > I have a technical one for you gurus
>> >
>> > When I worked at the steel mill in Newcastle, Australia.
>> the laboratories
>> > were able to detect and read things that have been ground off.
>> > The company engraved all their tools with BHP, the rouges
>> would grind that
>> > off and steal the tools. If caught at a gate bag inspection
>> with suspect
>> > tools, they could take them to the lab and detect the
>> engraved BHP. By
>> > stamping or engraving it alters the grain structure of the
>> steel and it
>> > can be picked up by some sort of spectrograph.
>> > Does anyone in the US know of such a technique, I have a
>> R&V guy in Texas
>> > that needs to lift a serial number from a 4hp triumph line engine.
>> >
>> > Regards
>> > Peter Lowe
>> > R&V Engine Registrar
>> > Australia
>> > Ph: 61-266453455
>> > http://www.oldengine.org/members/plowe/rv-engines/rvpage.htm
>> > http://www.oldengine.org/members/plowe/rv-engines/rv-register.htm
>> > _______________________________________________
>
>
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