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ARSCLIST  November 2009

ARSCLIST November 2009

Subject:

Re: Quick ID - shellac, instantaneous, vinyl

From:

"[log in to unmask]" <[log in to unmask]>

Reply-To:

[log in to unmask]

Date:

Thu, 19 Nov 2009 12:52:12 -0600

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (60 lines)

Interesting observation about the "sound" a record makes when being 
handled.

Not all instantaneous records are heavy. If they are paper substrate, 
they will be much lighter. Glass and alum., heavier.

Getting into some esoterica here...Columbia 78s from a certain period 
are laminated, perhaps not quite so heavy as a solid shellac. I have 
nevered weighed either. Edison Diamond Discs are laminate over wood core 
and VERY heavy (and thick), These are all commercially released records, 
not instantaneous.

joe salerno


Shai Drori wrote:
> I never thought of this. It's sort of automatic to me and I guess to 
> everyone else. The look and feel totally different,  that I never spent 
> a second thinking about it. Vinyl is light flexible has a certain shine 
> to it and almost no sound when you handle it. Shellac has this sound to 
> it when you handle it that sounds brittle, sort of like a "don't @#$^  
> with me". And instantaneous are very heavy compared to the others of the 
> same size. Of course there are exceptions to the rule but over time you 
> sort of just know.
> The last time I was puzzled by a record that felt "wrong" was a few 
> years back when I got a shipment of glass records. During the War 
> aluminum was gone to the army and different substances were used for the 
> base, glass among them. Never been more scared than handling those 
> records and that includes nitrate stuff. The up side was that they were 
> ruler flat and played on the emt like a dream, great sound.
> m2c
> shai
> 
> Tracy Popp wrote:
>> Hello All,
>>
>> I have a question on visual identification of, and differentiation among
>> shellac, instantaneous and vinyl grooved disks. Are there quick visual 
>> and
>> non-destructive methods of determining the type of disk?
>>
>> I am aware that most instantaneous have three "spindle" holes in the 
>> center,
>> and one can generally determine that a disk is an instantaneous based 
>> on the
>> core material (if one can see the core material.) Any other suggested
>> methods of quick ID and differentiation - barring cracking the edge of 
>> the
>> disk to see the material composition? Is gently tapping the disk surface,
>> and listening for aural cues about material density an useful practice?
>>
>> Thanks for your assistance!
>>
>> Best,
>> Tracy Popp
>> UIUC Graduate Student MLS
>>
>>   
> 

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