Udfyldning og afstøbning
6. Udstilling og magasinering
Når en genstand er blevet konserveret, skal den magasineres eller udstilles.
I princippet bør man kunne magasinere en genstand under mere betryggende forhold end ved udstilling, fordi man ikke behøver gå på kompromis med nogle krav. Dette er heldigvis i stigende grad tilfældet, men ofte ses det, at udstillingslokalerne er gode klimarum med fornuftigt lys og regelmæssig kontrol, mens de tilhørende magasiner er fugtige kælderrum.
De ideelle krav er:
1. Så konstant klima som muligt - ideelt er 55 % relativ luftfugtighed og 18 °C. Statens Natur-historiske Museum anbefaler 12 °C til deres magasiner i det kommende byggeri.
Under 45 % RH vil knogler begynde at revne (Botfeldt og Richter 1998).
For følsomme tænder f.eks. fra flagermus vil revnedannelsen starte, allerede når RH er under 50% RH (Williams, 1991).
I takt med et stigende ønske om at bevare DNA i knogler med henblik på analyser, vil der komme et logisk ønske om at opbevare knogler så koldt og tørt som overhovedet muligt.
2. Undgå enhver form for mikroklima, der kan opstå nær varmeapparater, ved fugtige yder-mure, i tæt pakkede plastikposer, og så videre.
3. Undgå enhver form for direkte sollys ved udelukkende at bruge kunstlys (max. 150 lux).
Undgå UV-stråling større end 75 mikrowatt/lumen ved at vælge lamper uden UV-stråling, f.eks. glødelamper eller de anbefalede typer lysstofrør. Det bedste er naturligvis at opbevare genstandene i totalt mørke.
4. Genstandene bør udstilles bag glas for at undgå støv, snavs og berøring.
5. Undgå montrer af stærkt syreholdigt træ, f.eks. eg og kastanje.
6. Undgå skadelige dampe fra visse typer af spånplader og fra rengøringsmidler.
7. Undgå kontakt med metaller samt enhver form for farvende materialer, idet man risikerer pletter på genstandene.
8. Elfenben må aldrig komme i kontakt med svovlholdige materialer, f.eks. gummihandsker.
Svovlholdige materialer bleger og pletter elfenben.
9. Ved nedpakning af materiale bruges hvidt syrefrit silkepapir.
En grundbog i pasning af en naturhistorisk samling er Carter & Walker (1999), som dog kun i ringe grad omhandler knogler, tak og tænder.
7. Litteraturliste
Litteraturlisten gælder også bilag
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