
Jim
I am curious how those epoxy cylinders are made. Does anyone know? Are the masters electrotyped as in the old days? Does epoxy shrink enough to withdraw from the mold? Do the masters have a different thread pitch to compensate for the shrinkage?edisonphonoworks wrote:Yes Amberols ARE self destructing. These are the only Edison cylinder I do not know positive the formula for, and obviously, it is better that I do not, it has been elusive. I do think these have lead in them, litharge and also aluminum, and some recycled gold moulded records. I also have a formula for a wax that uses ebonite, in place of carnauaba, I think Ebonite is hard rubber, and what would happen is the sulfer in the rubber would evaporate over time, making the records very brittle. I think that they have reached the end of there shelf life, I have one Amberol that is in good shape, the others, have cracks or have almost shattered! If I had a four minute recording stylus, and some interested parties, that would like runs of the Amberol records done by the Miller process, on hard epoxy,I could cut electrical cylinder masters flat from high def transcription, from a DVD master, or hi-fi VHS format to the cylinder master. I would like flat with no EQ and no filters, no scratch removal nothing, just a clean transfer, to make the copies, recorded at 0 dbm. Just an idea. I have thought about conducting melt tests with the Amberol wax and seeing what it is like in the melted state, I have quite a bit of broken Amberol records around.