[Rockhounds] Dextrin?

[Axel Emmermann]

Any adhesive will cause a slight color change.
Maybe the least visible effect may be obtained with a careful spray of....
(drumroll...) .... hairspray.
I used that to preserve very fragile stibnite and vivianite XX.

It works but acrylic spray is the best. No doubt about that.

Cheers

Axel (all sticky now)

----- Original Message ----- 
From: "Maurice de Graaf" <mauricedegraaf at xs4all.nl>
To: "Rockhounds at drizzle.com: A mailing list for rock and gem collectors"
<rockhounds at lists.drizzle.com>
Sent: Sunday, September 05, 2004 12:00 PM
Subject: RE: [Rockhounds] Dextrin?


> Hi,
>
> It really depends on the type of rock. I hear many people complaining
about
> instability of their carbon fossils. The trick is to collect not the coal
> itself. At least here in Europe most coal deposits consists of banks of
coal
> inbetween black shale like rock. The fossils in that shale are very stable
> and require no preparation at all.
> Fossils of real coal are a disaster. The coal I collected (Holland,
> Ibbenbuhren and Ruhr area) is pretty rich in pyrite. That will inevitably
> oxidize and fall apart, making your whole sample instable. Varnishing
might
> help, but I do not like the unnatural luster of that.
> So I personally leave all true coal fossils on the dump and only take the
> shale fossils.
>
> But if anyone has an idea of preparing carbon fossils without yielding an
> unnatural luster (or swarms of flies and children :-) ) I'm interested!
>
> Cheers,
> Maurice
>
>
> -----Original Message-----
> From: rockhounds-bounces at lists.drizzle.com
> [mailto:rockhounds-bounces at lists.drizzle.com]On Behalf Of David Lehker
> Sent: 05 September 2004 05:34
> To: rockhounds at lists.drizzle.com
> Subject: [Rockhounds] Dextrin?
>
>
>
>
> I recently collected several carbon fern fossils and in looking for how
> to prepare them found a reference to Dextrin.  I did a search and can
> find very little on this substance as something to use for fossil
> stabilization.  Anyone familiar with it or where to get it?
>
> Any suggestions on basic, inexpensive preparation of carbon based fern
> fossils?
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