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These mags are indeed acetate. I haven't noticed if print through is worse with acetate or poly - I've seen it with both. Ellis On Fri, Mar 13, 2015 at 5:23 AM, Tom Fine <[log in to unmask]> wrote: > Does the fact that acetate was used to back mag-film well into the 60s > (most tapes went to polyester by the late 50s) have anything to do with it? > > ----- Original Message ----- From: "Ellis Burman" < > [log in to unmask]> > To: <[log in to unmask]> > Sent: Thursday, March 12, 2015 10:28 PM > Subject: Re: [ARSCLIST] Tape tails out > > > Ha! That's a good one! Sounds like marketing speak! >> >> The base it pretty thick, but then again so is the oxide. It can be >> pretty >> severe even on mag, though I think I've heard worse from tape. These mags >> also sit on the shelf often untouched for many decades, and often in >> non-ideal storage conditions. >> >> Ellis >> >> On Thu, Mar 12, 2015 at 7:10 PM, Tom Fine <[log in to unmask]> >> wrote: >> >> >>> I'm somewhat surprised by Ellis's story about such audible print-through >>> on 35mm mag-film. One of the touted advantages of 35mm vs. tape in the >>> brief time it was used as a music mastering medium was "no print-through" >>> due to the thick film medium and magnetic emulsion. >>> >>> -- Tom Fine >>> >> >> >> -- Ellis [log in to unmask] 818-846-5525