Paleonet: problems with some old thin sections

Андрей Журавлев ayzhur at mail.ru
Mon Sep 10 06:08:27 GMT 2018


Dear Bruno,

When I was revising some type collections (thin sections of limestones) from Canada and the USA of 1970-s, I met same problems. Thus, perhaps, this organic glue was in wide use. In such a case, it would be better to find out in museums/universities housing such material what exactly had been used for the preparation of thin sections in that time? And, then, to ask specialists on organic chemistry if it possible to dissolve this matter.
In general, it is possible to melt such a glue by very slow hitting but during subsequent crystallization it can distort the specimen itself completely.

Best,
Andrey Zhuravlev


>Понедельник, 10 сентября 2018, 13:03 +08:00 от Bruno Granier <bgranier at univ-brest.fr>:
>
>Dear Paleoneters,
>some time ago, I have inherited a large collection of (petrographic)
>thin sections, mostly from limestones, prepared to study their
>microfossil contents.
>A significant number displays a centripetal deterioration (see
>pictures attached). Apparently it affects the glue. May be you have
>faced a similar problem and I should be very pleased if you could
>share your "bad" experience:
>1) is there a way to revert the process?
>2) if not, is there a way to stop it?
>"Bien à vous",
>Bruno Granier
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>Paleonet at paleonet.org
>http://lists.paleonet.org/mailman/listinfo/paleonet

-- 
Андрей Журавлев
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