[78-L] 1928 Film: How A Columbia Record Is Made

[Michael Biel]

I've been trying to re-find this film for several years.  It reveals
that laminated discs were pressed in the opposite way than we had all
thought.  The top surface shellac material is first fused to the paper
layer. This starts around 17:00 in.   Then these are placed with the
labels under and on top of the lump of core material.  This part comes
around 20:00 in. All of us thought that the paper layers were pressed
flat with the core and THEN the top shellac lumps would placed on and
under the powder blank like Edison did, and put into the press. 

http://archive.org/details/ColumbiaRecordingPlant1928


There are other interesting things of course, like Stravinsky conducting
a recording session, and then come a pop band recording session -- who
is this???



Mike Biel  mbiel at mbiel.com