All,
I think Eric should be congatulated. Good job OM! This goes in the hints
and kinks file on my PC. I learned alot from this thread. I appreciate
all who contributed.
Very 73
Jay
Eric Gustafson wrote:
>
> Hi Kurt, Mike,
>
> Well I asked the A&P guy. He said that there are certified
> markers that can be used. He said they looked to him just like
> Sharpies. So, since this applies to metal marking which we do
> here at work from time to time, I contacted Sanford (makes
> Sharpies) and asked them about using Sharpies for metal marking.
> I was put into contact with one of their their chemists.
>
> Here is the useful part of our exchange:
>
> >Dear Eric:
> >
> >Thank you for your inquiry regarding our Sharpie Marker.
> >
> >Actually, the Sharpie Marker may have high levels of halogens
> >and Sulfur, which may cause corrosion on metal. We have not
> >performed any testing on this marker to know for sure.
> >
> >However, we offer a product called the T.E.C. Marker (Trace
> >Element Certified.) Every batch of ink for the T.E.C. Marker is
> >tested in accordance with the GE Aircraft Engine Spec D50TF8-S6
> >and the Dept of Energy Nuclear Spec RDT F7-3T. The actual
> >analysis and a certification letter, certifying that our marker
> >ink is in compliance with these two specs, are supplied with the
> >marker.
> >
>
> These markers are specifically intended for safely marking on
> aluminum and other metal surfaces. I subsequently found out that
> any reasonably large stationery store that carries Sanford
> products can order these pens for you. But you have to know the
> correct part number. So, here 'tis:
>
> Sanford 13501 (may be shown as SAN-13501). This is a black broad
> tip marker.
>
> Sanford 13401 (may be shown as SAN-13401). This is a black fine
> tip Sharpie
>
> As you can see, the choice of color is not difficult.
>
> It may well be that the regular Sharpie is safe for aluminum
> without the certification. But to be absolutely certain, the
> T.E.C. markers are the way to go. I didn't run down the price.
>
> The vehicle appears to be Xylene. Some of the trace elements
> listed in the sheet they sent me are aluminum and zinc. It is an
> impressive list but does not contain carbon or graphite.
>
> 73, Eric N7CL
>
To: <towertalk@contesting.com>
> >Date: Fri, 01 Jan 1999 11:12:33 -0800
> >From: Kurt Andress <NI6W@contesting.com>
> >
> >Michael Tope wrote:
> >
> >> Very interesting, Kurt. I wonder if Sharpies are safe? These
> >> things are great for marking on just about anything, but I
> >> never thought about the corrosion angle.
> >>
> >> 73 & HNY,
> >>
> >> Mike, W4EF..............
> >>
> >
> >Hi Mike,
> >
> >As far as I know Sharpies, grease pencils and other colored
> >pencils would be ok. I don't know what the Sharpie uses to make
> >it black. Hopefully not carbon. Unfortunately, the Sharpie and
> >other felt pens make rather wide lines that make it hard to do
> >close tolerance work.
> >
> >I use regular old wax based red pencils. or fine tipped felt
> >pens.
> >
> >Maybe Eric, N7CL can find out what from his ex - A&P colleague
> >what the "approved" marking materials are?
> >
> >73, Kurt
> >
> >K7NV "That's K7 "Nevada" (ex - NI6W)
>
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