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This is the 1960 3M Sound Talk for print through http://www.aes.org/aeshc/docs/3mtape/soundtalk/soundtalkbull38.pdf There are 1000 papers listed in the Audio Engineering Society E-Library for the term print through. http://www.aes.org/e-lib/online/search.cfm The top one I got was one from 1980 by Neal Bertram et al. Neal understands this stuff better than most. Here is the link to that paper: http://www.aes.org/e-lib/browse.cfm?elib=3957 I don't know if Mallinson's books have much on that, but from all accounts he was a genius in this area. I'm glad to see his book available in print-on-demand. I'd go with a used copy, however <smile>. I can't guarantee what help it will be no time to look right now. http://www.amazon.com/Foundations-Magnetic-Recording-2E-Second/dp/0124666264/ref=sr_1_3?ie=UTF8&qid=1426201237&sr=8-3&keywords=john+mallinson Cheers, Richard On 2015-03-12 12:45 PM, Steven Smolian wrote: > I, too, recall but can't find the article, though it may have been one of > those 3M published bulletins as well. > > I believe Del identified two kinds of print-through, one ccaused by too much > level and consequent leaf-to-leaf transfer of too much magnetism- I don't > know the techincal tern for that. The other was a storage phenomenon of > slowly generated (or whatever THAT term is) movement of alterady recorded > program that was discharged during rewind. In the former case, I believe it > was considered "baked in." > -- Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada 647 479 2800 http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.