[78-L] dewarping shellac, was AFRS

[neechevoneeznayou at gmail.com]

I have also used the sun bake method.

joe salerno


On 2/12/2011 10:17 AM, CelticGuitar666 at aol.com wrote:
> I slowly heat them on a piece of glass in oven I forget what the temp is
> but if you let them cool slowly they will be flat and not out of round.
> Summer  time is great for this as I place them out in the sun for a short period.
>   just don't forget them they don't tan well
> Dwight
>
>
> In a message dated 2/12/2011 9:50:39 A.M. Eastern Standard Time,
> neechevoneeznayou at gmail.com writes:
>
> I've  never had much success dewarping shellac. Yes it can be warmed
> gently and  pressed into a flat condition, but somehow the thing seems
> afterward to be  out of round.
>
> Anyone else ever encountered this?
>
> joe  salerno
>
> On 2/11/2011 9:45 PM, Steven C. Barr wrote:
>>   From:<neechevoneeznayou at gmail.com>
>>> OK, so if vinyl is warmed  sufficiently and put under some pressure, it
>>> can be forced to  change shape, which is how vinyl records are made in
>>> the press as  we all know. Same for shellac, altho lower temps will warp
>>>   shellac. I assume a record store at an angle or with something on top
> of
>>> and below could do the same over time, be forced out of a  flat
>>> condition. If these transcription records were packed tightly  in boxes,
>>> perhaps this will not have occurred.
>>> That  would explain why I have seen so little warping in my vinyl
>>>   collection, excluding those records which came factory  pre-warped.
>>>
>> The OTHER difference is that shellac records  exposed to high
>> temeratures becdome flexible...and retain their new  shape when
>> cooled. Repairing this requires only that the records be  reheated
>> to the point of flexibility and manually be bent into  "flatness"...!
>>
>> OTOH, vinyl records when "over" heated will  actually expand
>> physically...creating a "warp" when the newly expanded  vinyl.
>> with "no place to go," forces the record to "warp" and  thus
>> accomodate the expanded vinyl!
>>
>> Steven C.  Barr
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