RE: [AV Media Matters] Transcript Discs

[russm@idirect.com]

We use HFE-7100 constantly in film cleaning.  3M does have an MSDS
sheet available and although I don't have it in front of me, the
overall impression is that it is quite safe in normal use.  It does
evaporate VERY quickly (trust me I spilled it once.  the evidence
was gone in seconds).

Certainly we ventilate the room directly to the outside and avoid
sticking our hands into the retaining tank...

You're cautions are noted however.

If you can't get the MSDS email me at work and I'll fax it to you.

Russ M.
russ_mcmillen@cbc.ca

On Wednesday, April 05, 2000 7:32 PM, hkaplan@sos.state.ga.us
[SMTP:hkaplan@sos.state.ga.us] wrote:
>>Cetrimide is a generic name for n-cetyl ammonium bromide and should be
>>available from chemical supply companies.
>>
>>Eucalyptus oil is a mild solvent which we have observed to
>>work well on all manner of sticky, greasy or oily contamination.
>
>>HFE's (hydro fluoro ethers) are good solvent based cleaners
>>for lacquers, and can be used with care on cracked or flaking lacquer
>>discs.  HFE 7100 is a good replacement for Freon TF.
>
>>These solvents are safe, but  can be quite expensive.

>In that there are individuals on this list with varying degrees of
>expertise, I think it would be of great benefit if contributors could
>be a bit more specific when alluding to the safety of the materials
>they describe.  I have quickly attempted to locate MSDS on all of the
>substances described above, but was unable to find adequate
>information that would lead me to believe these materials can be
>considered "safe" in the way that word would be most widely interpreted.
>Please keep in mind that many of us have learned to understand that
>"use in a well ventilated area" really means in a fume hood and/or
>with a respirator.  "Safe" will depend on the manner of use. Also keep
>in mind that your workspace may be shared by others and that your
>air may be recirculated to other parts of a building in which unsuspecting
>individuals may be susceptible to contamination.
>
>I have been cautioned that no ether (especially a fluorine compound)
>can be very safe for inhalation and that there is probably a dermal question
>as well.  In addition, all refrigerants are considered nasty to some degree
>and are aphyxiants in tight unventilated quarters.
>
>Hilary A. Kaplan
>Conservator
>Georgia Department of Archives and History
>330 Capitol Avenue
>Atlanta, GA 30334
>404 656 3554
>FAX 404 651 8471
>hkaplan@sos.state.ga.us