I would agree with others' opinions on this. I have not actually tried a wear test on Metrolite or similar plastics, but I would hesitate to use a heavy reproducer (acoustic or early electric) at 100 grams tracking force or so on these soft records. And I'm also not comfortable using the 30 gram setups of the prewar period with them, either. I have a number of these early plastic 78s and I play them only with 5 grams or less tracking force with a modern hifi cartridge and get very good results from them. Greg Bogantz ----- Original Message ----- From: "Thatcher Graham" <thatcher at mediaguide.com> To: "Antique Phonograph List" <phono-l at oldcrank.org> Sent: Wednesday, February 13, 2008 10:27 PM Subject: [Phono-L] open question > > I have a number of 78s that are not shellac or at least do not appear to > be. In many cases (depending on brand) their labels indicate they are > made of Metrolite I've read that Mercury used "Merco Plastic" MGM used > Mercolite and Savoy used Sav-o-Flex. > Do these have the same resilience as my shellac 78s? I am concerned that > normal play will wear them more quickly. If they are made of a a PVC/ENR > blend that is probably the case. > > -- Thatcher > > > > > Metrolite, Merco Plastic, and Sav-o-flex! >> >> >> >> _______________________________________________ >> Phono-L mailing list >> http://phono-l.oldcrank.org > > > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org