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All,

Howard has a very difficult problem here because he is dealing with a 
lacquer disc (Preaching to the choir again).

Howard: No matter what you do, it will affect the playability of the 
disc and the result will be more noise, less signal. Dennis Rooney's 
advice is good (test first, play later) as is Mickey Clark's. I have 
found that any type of cloth (including microfiber) will not get 
adequately into the grooves. It may take a stiff, fine bristle brush to 
accomplish that. Having repaired lacquers with paraffin wax (I often use 
sharpened Crayons), I will start the cleaning process with The Disc 
Doctor's Lacquer Cleaner. It doesn't remove all of the paraffin, but it 
will get the worst of it and certainly cleans the rest of the disc. 
Playing the disc a few times afterwards will often get the rest as the 
needle plows through the problem areas. Of course, the fidelity gets 
worse with each pass, but the affected area generally improves. so, to 
get the best end result, it may take some editing. I have often played 
the disc with 3 different size styli; Above the normal wear pattern, in 
the normal wear pattern and, below the normal wear pattern. Then, after 
a couple of passes of each, assemble edit for the best results. If you 
are doing this for yourself then, no problem. If this is client related, 
it can be a problem because time equals money and you are /always/ are 
expected to deliver.

Best of luck with that,

Corey

Corey Bailey Audio Engineering
www.baileyzone.net

On 7/31/2019 12:02 PM, Dennis Rooney wrote:
> Lighter fluid (heptane) has always been effective in removing adhesive from
> acetate magnetic tape. It may work well on the discs but test an
> unimportant are a first!
>
> DDR
>
> On Wed, Jul 31, 2019 at 2:49 PM Martin Fisher <[log in to unmask]>
> wrote:
>
>> I've used Ronsonol lighter fluid to great effect in the past with no
>> problems.
>>
>> Martin
>>
>>
>> -----Original Message-----
>> From: Association for Recorded Sound Discussion List <
>> [log in to unmask]> On Behalf Of Howard Sanner
>> Sent: Wednesday, July 31, 2019 1:39 PM
>> To: [log in to unmask]
>> Subject: [ARSCLIST] [AESHC] Cleaning grease pencil off discs
>>
>> I recently (as in yesterday) acquired some Speak-o-Phone discs. Unlike
>> others I have, which are recorded on bare aluminum, these have a lacquer or
>> acetate coating on an aluminum substrate. (I'm not going to strike a match
>> to find out if it's acetate or lacquer!)
>>
>> One disc has two bands. The inner one has been drawn through using grease
>> pencil in a pseudo-sine wave shape like you might use to scratch out a line
>> of text. I'd like to remove the grease pencil and try playing this band.
>> The band without grease pencil is Lily Pons on the Ford Sunday Evening Hour
>> from 1941.
>>
>> So does anyone know how to remove grease pencil like this without damaging
>> the disc?
>>
>> Thanks.
>>
>> Howard Sanner
>>
>