In message
<OFE815E095.D25FB00D-ON86257B3B.004CB8DC-86257B3B.0051B80F@LocalDomain>,
dated Wed, 27 Mar 2013, Binayak Marahatta
<[email protected]> writes:
I believe that the value of Durability of marking is very high.
When I worked for IT&T in Britain, we used the definitive solution -
second surface printing (printing in reverse on the back of the sheet)
on acetate sheet. The solvent can't even get at the printing. Now you
just have to make sure you don't test with something that will dissolve
the acetate or the adhesive. The latter is more vulnerable - that's what
the test liquid needs to have low aromatic content.
'Aromatic' doesn't mean 'smelly', it means that the molecule of a
compound has one or more 'unsaturated' (strictly, 'conjugated' - the
double bonds are not localised) planar carbon rings. Benzene is the
usual example.
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
SHOCK HORROR! Dinosaur-like DNA found in chicken and turkey meals
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
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