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Almut, To date, I haven't run across ANY Zonal tape that has developed "sticky shed" (if by that phrase you mean binder hydrolysis). We have Zonal sample material going back to about 1962 up through the late 90's, and it all seems to be in pretty good shape. I don't have much info on what the chemistry of their binder was (manufacturers don't typically divulge their "trade secrets", but most of the European manufacturers managed to steer clear of the binder problems that plagued domestic US manufacturers. Also, to the best of my knowledge, there aren't any cases of binder hydrolysis related to acetate base material. (Richard Hess or Jim Wheeler may have some other commentary on this). The 1960's era tapes have some issues with shedding, but nothing more serious than what we've seen on other formulations (mostly Ampex, Audio Magnetics, BASF, AGFA and 3M). Likewise, we did a batch of 1960's vintage Telefunken tapes recently that also seemed to be in pretty good condition. I'm not sure if they did their own manufacturing, or if it was contracted out to BASF, but the material seems to hold up pretty well. Scott D. Smith Chicago Audio Works, Inc. ----- Original Message ----- From: "Boehme, Almut" <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, March 02, 2005 8:14 AM Subject: [ARSCLIST] Info on Zonal tape required ****Apologies for cross-posting*********** Dear All, Does anyone out there have any information on late 1960s Zonal tape? I need to know how likely it is that these tapes have sticky tape syndrom. Many thanks in advance. Almut Boehme -- Ms Almut Boehme Head of Music National Library of Scotland George IV Bridge Edinburgh EH 1 1EW Scotland UK Tel. +44 (0)131 226 4531 ext. 2328 Fax. +44 (0)131 622 4803 E-mail: [log in to unmask] http://www.nls.uk/collections/music/index.html ************************************************************************ Visit the National Library of Scotland online at www.nls.uk Have you heard about the John Murray Archive? If not, find out more at www.johnmurrayarchive.org.uk/jma ************************************************************************ The information contained in this e-mail is confidential and may be legally privileged. It is intended for the addressee(s) only. If you are not the intended recipient, please delete this e-mail and notify the [log in to unmask] : the contents of this e-mail must not be disclosed or copied without the sender's consent. The statements and opinions expressed in this message are those of the author and do not necessarily reflect those of the National Library of Scotland. The National Library of Scotland does not take any responsibility for the views of the author. This message has been virus scanned by MessageLabs. ************************************************************************