[Nhcoll-l] Translucent residue

[Tom Schioette]

I doubt that what Mandy talks of is glass degradation, or at least if it is, then it is probably formalin-induced somehow. I see precisely the same thing which Mandy describes, and, like in her case, in glasses that have contained formalin, probably also with a component of seawater, although I never thought about the latter detail myself.

 

Tom

 

 

Tom Schiøtte

Natural History Museum of Denmark (Zoology)

Universitetsparken 15

DK-2100 Copenhagen OE

Denmark

 

TSchioette at snm.ku.dk

 

 

 

Fra: nhcoll-l-bounces at mailman.yale.edu [mailto:nhcoll-l-bounces at mailman.yale.edu] På vegne af Evelyn.Ayre at pch.gc.ca
Sendt: 10. marts 2014 13:30
Til: Mandy Reid
Cc: Anders Hallan; 'nhcoll-l at mailman.yale.edu'; nhcoll-l-bounces at mailman.yale.edu
Emne: Re: [Nhcoll-l] Translucent residue

 

Hi Mandy,

This sounds to me as though you are seeing glass degradation.  Sometimes called glass disease, this phenomena manifests as iridescence and flaking and is caused by a leaching out of the alkali component of the glass.  I have only seen this on archaeological glass, but it's possible that this is what's happening to your glassware.  What kind of glassware do you have?  And is it very old?

Evelyn Ayre
Conservator - Intern | Restauratrice - Stagiaire
Preservation Services | Services de préservation
Canadian Conservation Institute | Institut canadien de conservation 
Department of Canadian Heritage | Ministère du Patrimoine canadien 
1030 Innes Road | 1030 chemin Innes
Ottawa ON Canada K1B 4S7
evelyn.ayre at pch.gc.ca <mailto:evelyn.ayre at pch.gc.ca> 
Telephone | Téléphone  1 (613) 998-3721 ext | poste 235
Facsimile | Télécopieur 1 (613) 998-4721
Government of Canada | Gouvernement du Canada

 Mandy Reid ---10/03/2014 01:20:01 AM---Apologies that this is off the current topic, but does anyone know what the shiny, flaky and slightl

From: Mandy Reid <Mandy.Reid at austmus.gov.au <mailto:Mandy.Reid at austmus.gov.au> >
To: "'nhcoll-l at mailman.yale.edu'" <nhcoll-l at mailman.yale.edu <mailto:nhcoll-l at mailman.yale.edu> >, 
Cc: Anders Hallan <Anders.Hallan at austmus.gov.au <mailto:Anders.Hallan at austmus.gov.au> >
Date: 10/03/2014 01:20 AM
Subject: [Nhcoll-l] Translucent residue
Sent by: nhcoll-l-bounces at mailman.yale.edu <mailto:nhcoll-l-bounces at mailman.yale.edu> 

________________________________




Apologies that this is off the current topic, but does anyone know what the shiny, flaky and slightly mirror-like reside is that forms on the sides of glassware that has previously contained 5-10% seawater/formalin that has been buffered using sodium bicarbonate? It is very difficult to wash of glassware as a rule but it sometimes flakes off in small particles.
 
I am wondering whether it is a harmful if inadvertently inhaled.
 
Any ideas?
 
Thanks
Mandy
 
Dr Mandy Reid
Collection Manager, Malacology, Australian Museum Research Institute
Australian Museum 6 College Street Sydney NSW 2010 Australia
t 61 2 9320 6412  f 61 2 9320 6253 
Visit: http://www.australianmuseum.net.au <http://www.australianmuseum.net.au/> 
Like: http://www.facebook.com/australianmuseum <http://www.facebook.com/australianmuseum> 
Follow: http://www.twitter.com/austmus <http://www.twitter.com/austmus> 
Watch: http://www.youtube.com/austmus <http://www.youtube.com/austmus>  
 
Inspiring the exploration of nature and cultures 
  

Book Online tyrannosaurs.com.au <http://tyrannosaurs.com.au/>   

Click here to read the Australian Museum email disclaimer: 

 http://info.austmus.gov.au/disclaimer.htm <http://info.austmus.gov.au/disclaimer.htm>   

_______________________________________________
Nhcoll-l mailing list
Nhcoll-l at mailman.yale.edu <mailto:Nhcoll-l at mailman.yale.edu> 
http://mailman.yale.edu/mailman/listinfo/nhcoll-l <http://mailman.yale.edu/mailman/listinfo/nhcoll-l> 

_______________________________________________ 
NHCOLL-L is brought to you by the Society for the Preservation of
Natural History Collections (SPNHC), an international society whose
mission is to improve the preservation, conservation and management of
natural history collections to ensure their continuing value to
society. See http://www.spnhc.org for membership information.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20140311/358ece73/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 105 bytes
Desc: image001.gif
Url : http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20140311/358ece73/attachment.gif 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 1869 bytes
Desc: image002.png
Url : http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20140311/358ece73/attachment.png