Bob,

One simple method of protecting stamped inks is mask them
using peelable-latex soldermask that is used for
wavesoldering application.  Let it dry prior to a cleaning
cycle and remove the mask afterward.

regards
Matthew Park
NII Norsat International Inc.

>>> Ferrell-2 Bobby
<[log in to unmask]> January 28, 1998
5:22 am >>>
Hello Technetters,
Any suggestions on the following problem would be greatly
appreicated.

We are manufacturing/assembling small amounts of custom
boards in house
and are having a
problem with the ink stamped serial numbers on the board.
We have tried
several different types of coatings (epoxies, varnishes, etc.)
to try
and protect the ink stampings from coming off.  The
difficulty that we are having now is that during a cleaning bath
in 200
proof alchol the epoxy is
peeling off.

Does anybody out there have any suggestions as to what to
use to protect
the ink stampings.

TIA,


Bob Ferrell
NASA
MM-G1/G3
Kennedy Space Center, FL.  32899
407-867-6678

>

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