[78-L] RCA Victor reverse side "spider web" etching name?

[Mwcpc2 at aol.com]

Somewhere I saw a patent on the subject. The description went into some  
detail as to why it was desirable to have a pattern on the "blank" side.
 
When there were only single-sided or double-sided records, the  pressure, 
temperature, time, and size of the shellac charge could be optimized  for the 
process. However when one tried to mix single and double pressings, the  
difference in texture of the sides caused problems, requiring readjusting the  
process. The patterns eliminated the need to adjust the process for the odd  discs.
 
Many promo or DJ discs simply have blank grooves or a tone on the unused  
side, however this would be confusing to the consumer, thus the fancy  patterns.
 
Mike Csontos
 
 
In a message dated 1/7/2009 9:22:32 P.M. Eastern Standard Time,  
davdieh at aol.com writes:

I doubt  that structural integrity would be an issue with vinylite pressings 
like the  ET that I have. I've been told that the belief was that it was 
helpful to have  some sort of texture on the blank side so that the pull between 
the two  stampers would be more equal and there would be fewer problems with 
discs  sticking to one side. As pressing speeds increased and shellac quality  
decreased I can see where that might apply. That was why some single faced  
records had a blank label as well.
But this may be urban legend, too. Maybe  they just thought it was neat.
David Diehl




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From: Malcolm Rockwell  


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