Karsten tube tests on sandstone

Jim Mann <jmann [at] amdel__com> writes

>I'm after suggestions for methods of fixing a Karsten tube apparatus
>to a weathered (but flat) historic sandstone face that will leave
>minimal trace (preferably none) after testing--any ring stains left
>behind will be quite conspicuous.  The test will be carried out with
>the sandstone in an horizontal position.

There is a polish modification of the Karsten tube, the so called
Mirowsky tube, witch is more suitable for sensitive surfaces. The
stone is only touched by a little sponge, the tube itself is fixed
to a tripod or the scaffolding. Best regards,

Olaf Pung
stone conservator, Berlin


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                  Conservation DistList Instance 16:39
                Distributed: Tuesday, December 10, 2002
                       Message Id: cdl-16-39-008
                                  ***