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- From: vporguen@unlinfo.unl.edu (victor porguen)
- Newsgroups: misc.wanted,sci.chem
- Subject: Re: Seeking Canadian Balsam Oil
- Date: 28 Dec 1992 04:43:37 GMT
- Organization: University of Nebraska--Lincoln
- Lines: 55
- Distribution: na
- Message-ID: <1hm0lpINNpb0@crcnis1.unl.edu>
- References: <1992Dec27.033422.26022@zip.eecs.umich.edu>
- NNTP-Posting-Host: unlinfo.unl.edu
-
- kfr@quip.eecs.umich.edu (K. Fritz Ruehr) writes:
-
- > My wife and I are very interested in obtaining a small amount of an oil
- >called Canadian (aka "Friar's") Balsam oil, for the purposes of re-oiling
- >an emerald (apparently this is one of the few suitable oils). Our jeweler
- >is having a lot of trouble finding a source (we understand it is also used
- >as a microscopic slide fixative and for some other purposes). We are
- >looking for the *pure* oil, as opposed to some scented variety used in
- >the perfume business (the natural scent of Balsam would be OK).
-
- > We need only about enough oil to cover the ring ("a quarter of a film
- >canister", as our jeweler describes it).
-
- I am very familiar with a substance called Canada BAlsam. It is
- actually a balsam, not an oil, meaning that it has a pasty
- consistency and has both oil and resin components. It is derived
- from the common Canada Balsam Fir.
-
- It used to be a VERY common substance in microscopy labs (biological,
- mineralogical, industrial, medical and others) because it was used
- to cement microscopical preparations. It was also used to cement
- optical elements in compound lenses.
-
- I've NEVER heard of it being used to "oil" emeralds, or any other
- precious stones.
-
- In its natural state, it is a sticky paste with a very pleasant
- balsamic odor. Processed, it becomes hard and brittle, but is softened
- by heat. It is soluble in xylene (xylol) and similar solvents, as
- well as many other solvents.
-
- Canada Balsam hardens and yellows with age, and becomes brittle and
- opaque because of oxidation. Therfore, it is no longer used for ANY of
- the purposes it used to be employed for. It has been totally replaced
- by either synthetic or other natural balsams/resins.
-
- I have fairly large amount of Canada Balsam, both virgin and processed
- and you are welcome to some of it. However, I don't think it will be
- useful for what you want.
-
- There is a substance called Cedar Oil, totally different from Canada
- Balsam, which might be more useful for saturating cracked stones such
- as emerald. I have some of this, too, if you want it. Let me know
- and send me your postal address. No charge <g>.
-
- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- Victor Porguen
- SMTP/Internet: vporguen@unlinfo.unl.edu
- UUCP: ...!unlinfo.unl.edu!vporguen
- Voice: (203) 847-8992 (9:00 - 17:00 EST)
- Fax: (203) 845-9182
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