Re: [ARSCLIST] cleaning lacquers ("acetate") - palmitic acid deposit

[Roderic G Stephens <savecal@xxxxxxxxxxxxx>]

Hello Duane and All,

We used the Disc Doctor's (Dr. Duane Goldman) brushes
and solutions on a project that mean't cleaning over
200 16" acetates, many of which had the white palmitic
coating that has been described.   We had total
success in being able to get clean and quiet discs as
a result of using the brushes and solution, and I
still have a bottle and brushes which I use on LPs to
prepare them for digitizing.   So, in MHO, the stuff
works, brilliantly!   Why take the chance with harsher
washes when this process does the job?   We had some
pretty heavy deposits at times, so we had to clean the
those discs more than once, but were always able to
come up with a quiet final result and excellent
fidelity.  

In reading the Indiana University PDF, I find it
ironic that they use Disc Doctor brushes and solution
during the process, but find it necessary to use
ammonia solutions on top of that.

Rod Stephens (of the Family Theater radio broadcasts
project)

--- H D Goldman <thedoctor@xxxxxxxxxxx> wrote:

> With all due respect to those who have replied to
> this thread, a few  
> comments are in order for those who have not heard
> them before.
> 
> Our MIracle Record Cleaner is milder toward
> phonograph record surfaces  
> than ammonia solutions, has been repeatedly
> demonstrated to thoroughly  
> & safely remove palmitic acid residues, and unlike
> ammonia solutions,  
> thoroughly & safely clean the groove as well.
> 
> Purchased in larger quantities it is hard to justify
> using audibly  
> less effective fluids based upon cost alone.
> 
> Cheers,
> 
> Duane Goldman
> 
> On Jul 10, 2008, at 11:20 AM, Casey, Michael T
> wrote:
> 
> > The cleaning formula and basic procedures used for
> lacquer discs at  
> > the Archives of Traditional Music are detailed in
> the Sound  
> > Directions publication, page 27. Available at:
>
http://www.dlib.indiana.edu/projects/sounddirections/papersPresent/index.shtml
> >
> > I don't know that it qualifies as definitive, but
> it is the result  
> > of research, much experience, and consultation
> with Eric Jacobs.
> >
> > Mike
> >
> > ----------
> > Mike Casey
> > Associate Director for Recording Services
> > Archives of Traditional Music
> > Indiana University
> >
> > (812)855-8090
> >
> > Co-Chair, ARSC Technical Committee
> >
> > -----Original Message-----
> > From: Association for Recorded Sound Discussion
> List [mailto:ARSCLIST@xxxxxxx 
> > ] On Behalf Of Thomas Stern
> > Sent: Thursday, July 10, 2008 10:55 AM
> > To: ARSCLIST@xxxxxxxxxxxxxxxx
> > Subject: [ARSCLIST] cleaning lacquers ("acetate")
> - palmitic acid  
> > deposit
> >
> > there was some discussion of this a while back,
> but I can't find any
> > definitive
> > statement of a safe and effective way to clean
> "acetates" with white
> > deposits
> > (assumed to be palmitic acid).
> > Can someone provide a relatively safe, simple way
> to clean these  
> > discs?
> > Thanks!
> > Best wishes, Thomas.
> >
> 
> H D Goldman Lagniappe Chemicals Ltd.
> PO Box 37066 St. Louis, MO 63141 USA
> v/f 314 205 1388 thedoctor@xxxxxxxxxxx
>