[NHCOLL-L:4406] Lids for glass jars

[Gegick, Patricia, DCA]

Dear List,

I am attempting to purchase glass jars for alcohol storage of freshwater
gastropods and bivalves.  In reviewing my file on containers, I note the
following:
	Some museums like TEF lined lids
	Polystyrene lids are good if not exposed to benzene rings
	Polyethylene is good if not exposed to UV light
	"Bakelite" lids are not good
My mollusk reference suggests polypropylene lids with polyethylene
liners

The lid options I have are:
 	Pulp/vinyl (don't know what a "pulp" lid would be)
	Solid PE (polyethylene) lids
	PTFE/LDPE  Poly-tetrafluoroethylene lids with low density
polyethylene liners
	Fluoropolymer resin-lined caps
	Polyvinyl-lined caps
	Rubber-lined caps
PTFE-Faced LDPE Foam-lined Caps

Can anyone tell me if the PTFE lids would be appropriate and similar to
polypropylene lids?  Also what is "resin lined" and will 70-80% alcohol
affect this?  Thanks.



Patricia J. Gegick
Bioscience Collections Manager
Department of Collections and Research
New Mexico Museum of Natural History & Science
1801 Mountain Road, NW
Albuquerque, NM  87104-1375
Phone:  505.841.2867  Fax: 505.841.2866
email:  patricia.gegick at state.nm.us



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