who says 'you are not supposed to reuse tapes' ??
Depends on the environment/gear/load/purpose/environment/etc....
Whilst I agree with 'most every other point raised (quality tapes, maint., good practices etc.), Like Denis, I have a number of 'masters' which I tend to use once - normally for shooting. I have a
lot of scratch, backup and 'work' tapes (because of my project workflow... and the impossibility of backing up DV or bigger files via conventional Mac/file means).
My reuse numbers would be similar - only across several cams & decks (I sometime use cheap digital-8 gear for editing/work etc and a cpl miniDV cams) and with a few more 'work' tapes - digital-8 uses the DV codec, works fine, and saves wear on more expensive gear...
The only problem I've ever had was when Milady sorta
stood on one ... and lil plastic bits went everywhere. I disassembled it, and a new one, swapped the tape over, reassembled, recovered my material and then 'Binned' both tapes.
NB: I am
not a hi-volume commercial house (or I'd be using DVCAM or better) but, over time, these tapes have had many, many recordings made on them in SP and LP with nary a problem. As always,
b Caveat Emptor (="first, make sure the Cave is not occupied [say, by a snoozing bear]..." 🙂
but, as long as you keep prudent backups and handle tapes & gear sensibly I don't think you'll run into any problems reusing quality tapes.