[78-L] Diamond Disc mould.

Ron L'Herault lherault at bu.edu
Wed May 2 12:47:08 PDT 2012

I'll bet you could make a silicone impression of the master and play it
nicely with a lightweight pick up.   It would be akin to a vinyl diamond

Ron L

-----Original Message-----
From: 78-l-bounces at klickitat.78online.com
[mailto:78-l-bounces at klickitat.78online.com] On Behalf Of Thomas Edison
Sent: Wednesday, May 02, 2012 11:15 AM
To: 78 list
Subject: [78-L] Diamond Disc mould.

Re metal part.  To play a vertical master would you not want an upside down
U shaped stylus to fit over the inverted, hill-and -dale groove? Such as the
fancy term you used, I think is what you mean, or are you staying two
trunicated styli that ride both sides of the groove. Mostly likely play them
back on a liner tracking turn table.  You could make epoxy resin test
pressings from them too  Norman B should be able to help you do that, since
they are making new Diamond Discs.  It  might be possible to make a
metallic soap pressing   I can practice this, with a regular  lateral 78
stamper that I have and see if I can get it down to a science and let you.
I imagine if the wax is fildterd 4 times it should be pure enough for a
clean copy, and almost like playing a wax master. 


Shawn Borri
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