With tape wound tails out, this is a post-print. Note however that lower recorded signal values may result in the print-through being masked by background noise. The disadvantages are cost and decreased play time per reel. For example, voice recordings on typical mastering tape show less apparent print-through at 7.5 i.p.s than at 15 i.p.s. It is not thought to be.
Tests indicate it only governs the rate of print-through for the first few minutes.
No known commercial recorder has ever incorporated such a device. It is also theoretically possible to use digital processing techniques to completely remove print-through. A copy will record the print-through with bias and will have the permanence of the original signal. How can I be sure the tape recorder I'm using is electrically aligned. Do tape machines have to be electrically aligned again if the type of tape used now differs from the one used to align the machine.