[78-L] Glass Compound 78s

[joe@salerno.com]

I've read that with age glass becomes more brittle than it already is.

Sometimes it is best to handle a glass based record with support, put
another stiff record underneath

Do not try to cram too many on a shelf. I've seen this done where space 
was limited. Not a good idea.

Sometimes a record may say glass base on it and actually be aluminum
base. I think they didn't care if people were too careful, and if that
was the label at hand it was good enough. I've seen "glass base" stamped 
on a label with a rubber stamp.

joe salerno


David Lennick wrote:
> Very simple..assuming that it's sturdy enough for you to handle without it 
> breaking (and those things are VERY thin), hold it up to the light. If you see 
> translucent bluish, yep..it's glass based. As for the flaking, that's not 
> reversible.
> 
> If you find this somewhat risky, you can tape the edge lightly with your ring 
> finger. The sound will be different from tapping an aluminum disc.
> 
> Not all manufacturers identified glass lacquers, except on the sleeve, which 
> was pretty dumb. Amazing that 65 years ago, these things were able to be 
> shipped..carefully, yes, but they frequently made it intact. They must have 
> been a bit more flexible when they were new.
> 
> dl
> 
> 78records at cdbpdx.com wrote:
>> Greetings.  I am wondering how to easily identify glass compound 78s.  I was playing a record from 1942 and I noticed the sunlight was sparkling off the record in a rainbow of color, as if the light was being reflected through a prism.  I examined the record closely and discovered I could see brightly lit images through it.  It has an unfortunate crack and the edges of the crack seem to be flaking off like glass.  
>>
>> Could this be a glass compound record?  Are there any sure-fire ways to identify glass compound records besides cracking them and looking to see if the edges are flaking off?  
>>
>> Thanks!  CDB
>> ______________________________________
>>
> 
> _______________________________________________
> 78-L mailing list
> 78-L at klickitat.78online.com
> http://klickitat.78online.com/mailman/listinfo/78-l
>