>I believe that glycerin should be applied to the periostracum and
>this method gives the best results.  It should be reapplied every
>several years.

Glycerine attracts moisture... which is especially bad if the
specimen is in a particleboard or oak cabinet (Byne's disease). Been
there, done that. Glycerine will also soak into labels, trays & foam
padding; it tends to run off the specimen slowly. Paraffin doesn't
run and excess can be reomved with a paper hankie.

Glycerine however, if diluted with ethanol or formalin, is good for
preserving chitons, which remain pliable. Best keep them in sealed
vials to keep mold spores away.
--
Andrew Grebneff
Dunedin
New Zealand
Fossil preparator
<[log in to unmask]>
Seashell, Macintosh, VW/Toyota van nut

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