JeffM wrote in message
...
N Cook wrote:
I could not read 3 of the 5 characters on a heat damaged TOP66
[...]I wondered if a sort of "brass rubbing" would work.
I just happened to have some plummer's PTFE tape[...]
Laid a piece over it, rubbed with a finger nail,
and the missing characters came up like magic.

Cool.
That's a lot cheaper than what I thought of when I read the Subject
line.
http://www.google.com/search?q=dead-...nt-wavelengths

http://www.google.com/images?q=dead-...lengths+laputa
n

There is a much more impressive system using phase array Xray or MRI or
something of very high 3D resolution to read scrolls/ medieval pipe rolls
etc without unrolling them

maybe
http://www.herculaneum.ox.ac.uk/herc...archissue3.pdf
but I've not time to download it at the moment

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/