Keep in mind the 2” factor, yes? I would not be surprised if the 2” was the difference… or even 2” for export? <L> Lou Judson Intuitive Audio 415-883-2689 On Jan 29, 2016, at 9:57 AM, Richard L. Hess <[log in to unmask]> wrote: > This has been a great thread--and I'd like to focus on one part of it. > > Perhaps there was a different version of Ampex 456 sold into the Commonwealth? Could that be? Although I think all of the 456 I have had has come from Opelika. > > Ted in the UK, Marie in NZ, and I'm in Canada and we are all seeing extended baking times for 456 and related tapes much of the time. > > The problem is it's easy once you see the need for extended baking times to make it part of your protocol. It does no damage, whereas insufficient baking can create a problem. > > But, we have Tom saying he hasn't seen the need and that concurs with the Library of Congress's experience.