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Re: [ARSCLIST] If I knew you were coming I'd've baked a tape...

At 11:10 PM 1/10/2005 -0500, you wrote:
Hello, Duane,

When 1-propanol evaporates, does it leave any of its slightly oily feel behind
in the form of a film? I don't think that would be good.


used on a Q-tip or similar applicator the fluid evaporates without a
residue on either heads or parts. it is less likely to do harm than
iso-propanol.  as I mentioned, it is less aggressive toward plastics &
rubbers than either methanol or iso-propanol.


Also, does it attack rubber? I would suspect not.

What do you think it might do when the capstan/pinch roller contacts it? I
suspect torque would be reduced so there may be a slowdown or flutter
component
introduced? Of course ISO might do that, too, but ISO doesn't feel oily.


I can not comment on this point but I would not expect any problems.  i
would not expect problems with the small amount of fluid involved.  it may
well be possible to use less fluid than when working with iso-propanol.

ponder as we might, nothing is going to replace a few well done evaluations.

regards,

Duane Goldman


We need something to break the stiction.

Cheers,

Richard

--

Richard L. Hess
http://www.richardhess.com/tape/


Quoting "H. Duane Goldman" <thedoctor@xxxxxxxxxxx>:

> Hi Richard,
>
> 1-Propanol [aka n-propanol is the least aggressive of the simple water
> soluble mono alcohols[the others being methanol, ethanol & iso-propanol]
> toward plastics & rubbers.  It has a boiling point just below water & a
> slightly oily feel when rubbed between the fingers.  It is its combination
> of water like & lipid like properties that makes it an important component
> of our record cleaning fluids.
>
> We've used neat pure 1-propanol for decades to clean tape recorder pinch
> rollers & heads with excellent results.  Because minor impurities in lesser
> grades of 1-propanol have a potential for harm, I never use any grade of
> this solvent below.A.C.S. reagent grade, 99.5%.  While not expensive when
> purchased from appropriate sources in volume, pints [the smallest container
> generally available] is not cheap, esp. when purchased from chemical supply
> houses by people without existing accounts.
>
> I can supply 10 mL samples if you'd like to try this solvent.
>
> Regards,
>
> Duane Goldman
>
> At 03:02 PM 1/10/2005 -0500, you wrote:
> >Hi, Duane,
> >
> >Could you please enlighten us as to why? As you gathered, it's being used
> >as a temporary lubricant to get it to play. Once.
> >
> >What might be better substitutes that don't gum up machines and don't
> >create capstan slippage?
> >
> >Thanks!
> >
> >Richard
> >
> >At 01:39 PM 1/10/2005 -0600, you wrote:
> >>Hi Marie,
> >>
> >>I think you will find the use of very pure normal propyl alcohol [aka
> >>1-propanol] to be better in this application.
> >>
> >>Regards,
> >>
> >>Duane Goldman
> >>
> >>
> >>At 01:35 PM 1/10/2005 -0500, you wrote:
> >>>Hi, Marie,
> >>>
> >>>Please tell more! You did this and the Dragon didn't bite your head
off or
> >>>breathe fire or whatever Dragons do when they get upset? How do you keep
> it
> >>>out of the mechanism?
> >>>
> >>>Thanks!
> >>>
> >>>Richard
> >>>
> >>>At 11:53 AM 1/10/2005 -0600, you wrote:
> >>>>Hi Richard
> >>>>
> >>>>I have had some success using ISO on cassette tape, I call it the
> >>>>"eye-dropper
> >>>>technique"!  Has worked each time for me when I had needed to use
> >>>>it.  This is a
> >>>>very crude version of my intravenous drip bag!
> >>>>
> >>>>Cheers
> >>>>
> >>>>Marie O'Connell
> >>>>Sound Archivist
> >>>>Mississippi Department Of Archives & History
> >>>>200 North Street
> >>>>Jackson, MS, 39201
> >>>>Ph: 601-576-6909
> >>>>
> >>>>"Richard L. Hess" wrote:
> >>>>
> >>>> > At 12:15 AM 1/9/2005 -0500, Steven C. Barr wrote:
> >>>> > >----- Original Message -----
> >>>> > >From: "Richard L. Hess" <ArcLists@xxxxxxxxxxxxxxx>
> >>>> > > > I would also caution that this writer's experience with cassette
> >>>>tapes and
> >>>> > > > baking is that most squealing cassette tapes appear to be
> suffering
> >>>>from
> >>>> > > > loss-of-lubricant (LoL) rather than the more common Sticky Shed
> >>>>Syndrome
> >>>> > > > (SSS) that afflicts reel tapes.
> >>>> > > > While LoL can affect reel tapes (I've seen it in Sony tape from
> the
> >>>> > >1970s),
> >>>> > > > SSS is more common. I have not actually seen a proven case
of SSS
> in
> >>>> > > > cassettes, while I have seen several instances of LoL. In
fact, I
> >>>>just did
> >>>> > > > an Ampex air-check cassette from the early 80s for a client that
> >>>>was LoL.
> >>>> > >I
> >>>> > > > was pretty sure, being Ampex, it would be SSS, but I was
> >>>>disappointed.
> >>>> > >Quick question...how does one lubricate a noisy cassette? I suspect
> >>>> that
> >>>> > >neither 3-In-1 or WD-40 would be advisable...
> >>>> >
> >>>> > Steven,
> >>>> >
> >>>> > There are several approaches, but http://www.lastfactory.com/ makes
> >>>> > commercially available tape head and tape lubricants that I use for
> the
> >>>> > purpose. In many LoL situations they need to be applied frequently.
> I'm
> >>>> > also using some experimental fluids that are more successful and
> >>>> > experimenting with other alternatives.
> >>>> >
> >>>> > Reel tapes with LoL are sometimes playable with an Isopropyl "Drip"
> >>>> which
> >>>> > Marie O'Connell had great success with in New Zealand and now in
> >>>> > Mississippi. I think this has been discussed here at length. I
haven't
> >>>>used
> >>>> > Isopropyl on cassettes yet because I haven't figured a way to do it
> >>>>without
> >>>> > annoying a Dragon and you know how ornery an annoyed Dragon can be!
> >>>> >
> >>>> > Cheers,
> >>>> >
> >>>> > Richard
> >>
> >>      ------
> >>h. duane goldman, ph.d.   |   P.O. Box 37066   St. Louis, MO  63141
> >>lagniappe chem. ltd.            |   (314) 205 1388 voice/fax
> >>"for the sound you thought you bought"       |   http://discdoc.com
>
>       ------
> h. duane goldman, ph.d.   |   P.O. Box 37066   St. Louis, MO  63141
> lagniappe chem. ltd.            |   (314) 205 1388 voice/fax
> "for the sound you thought you bought"       |   http://discdoc.com
>


     ------
h. duane goldman, ph.d.   |   P.O. Box 37066   St. Louis, MO  63141
lagniappe chem. ltd.            |   (314) 205 1388 voice/fax
"for the sound you thought you bought"       |   http://discdoc.com

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