[78-L] did we ever find consensus as to how to clean these things(Diamond Discs)

[Michael Biel]

Two points I would like to bring up.
1) I am not sure if everyone has seen the END of the subject line which
mentions that the subject is DIAMOND DISCS, not 78s in general.

2) There are two distinctly different types of Diamond Discs.  The early
ones have CELLULOID surfaces which were laid on as a sheet onto the wood
flour core.  It is only later that the surfaces became CONDENSITE which
was brushed on as a liquid in several coatings.  I am not sure if the
core was changed to China Clay at the same time as the switch to
Condensite, so there might be two types of Condensite discs.  We do know
that the wood flour core reacts to water much worse than does the china
clay type, and it is possible that the celluloid sheets react
differently to cleaning fluids differently than condensite, especially
since some discs had more coatings of condensite than others.  

Mike Biel  mbiel at mbiel.com  


-------- Original Message --------
Subject: Re: [78-L] did we ever find consensus as to how to clean
these things(Diamond Discs)
From: David Lennick <dlennick at sympatico.ca>
Date: Sat, November 27, 2010 6:23 pm
To: 78-L Mail List <78-l at klickitat.78online.com>

I find the same stuff I use for all other records, PhotoFlow + Distilled
Water 
(1:200), works just fine..I also take care not to let the stuff get
inside the 
disc if there's lamination which can swell or expand. But I haven't
noticed any 
problems even where that may have happened accidentally.

dl

On 11/27/2010 6:12 PM, Steven wrote:
> From: 78records at cdbpdx.com
>> Naptha seems to work well for me. Can't find naptha? Use ZIPPO lighter
>> fluid, pure naptha. (learned this from a stamp dealer)
>> DO NOT USE RONSON or other brand lighter fluids.
>>
> I would guess that a quick round of water + dish detergent would be the
> first step?
> This would remove the most obvious "dirt". Thereafter, I concede to the
> various
> "experts" out there in radio-land...?!
>
> Steven C. Barr