[78-L] Cleaning bare aluminum discs?

[neechevoneeznayou at gmail.com]

How severe is the noise at  these spots?

Transfers should be made, and digital tech can help relieve those spots. 
Future tech will no doubt yield better results, if the shows are saved now.

joe salerno


On 6/25/2012 9:09 PM, Glenn Longwell wrote:
> I recently came across 18 aluminum transcription discs of 1934 Jack Benny shows.  Unfortunately, they all have zinc oxide spots.  I've been wondering what to do with them so this thread is relevant but it would seem these may be a loss.
> Glenn
>
> --- On Mon, 6/25/12, Robert J. Lang <bobhope at ieee.org> wrote:
>
> From: Robert J. Lang <bobhope at ieee.org>
> Subject: Re: [78-L] Cleaning bare aluminum discs?
> To: 78-l at klickitat.78online.com
> Date: Monday, June 25, 2012, 5:07 PM
>
> Bryan,
>
> Make sure that you don't use any type of cleaner that is strongly
> acidic or basic, since these will attack the aluminum.  The mild
> soapy solution sounds like a good idea.
>
> One thing I've always wanted to try is to send an aluminum disc to a
> plating shop and have them treat it with a zincating process,
> followed by a very thin electroless nickel plate.  The zincating
> process removes the aluminum oxide and replaces it with a thin zinc
> coating that prevents further oxidation.  The electroless nickel
> process replaces the zinc with nickel, which has a low coefficient of
> friction.  That which would make the stylus slide easily over it's
> surface, possibly reducing the background noise.  I wouldn't try this
> on a good disc, but it would be an interesting experiment on a damged
> recording.
>
> Bob L
>
>
>
>> Date: Sun, 24 Jun 2012 17:01:24 -0400
>> From: Bryan Wright <bryan at claxtonola.com >
>> Subject: [78-L] Cleaning bare aluminum discs?
>> To: 78-l at klickitat.78online.com
>> Message-ID: <EFB8CCB5-0CFA-4915-ACEC-3D69EB96DA09 at claxtonola.com >
>> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
>>
>> Recently at an antiques store, I picked up some 10-inch bare aluminum
>> discs, including one intriguingly labeled "Paul Whiteman and His
>> Orchestra" and dated June 17, 1938. The records are filthy and have
>> some matter in the grooves. Can anyone offer any tips for safely
>> cleaning these things? I need a method strong enough to clean the gunk
>> out of the grooves, but obviously I don't want to damage the records
>> (which otherwise appear to be in decent shape).
>>
>> Thanks!
>> Bryan W.
>>
>
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-- 
Joe Salerno