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Re: A couple of questions for all you CD demagnetists out there.

RE #1 Doesn't seem to last an entire CD, as if the effects are fading fast.

But later you say:

BTW, the whole "demagnitization" thing is a misnomer, my take is that the huge magnetic fields generate enough current within the aluminum to heat the plastic locally, and casue any manufacturing stresses (like when they pry the polycarb out of the mold, and when sputtering the aluminum onto it) to relax, and allow the edges of the pits and lands to be more defined than before.

If the heat relaxes manufacturing stresses making the edges of the pits and lands more defined than before, then how are these stresses suddenly restored by simply playing the disc and subsequently making the edges of the pits and lands less defined again?

RE#2 This tweak is reducing the electrostatic charege on the CD, and may make it easier for the CD transport to servo track the data spiral, without having to fight the static electricity generated by spinning polycarbonate plastic through the air.

How does the foil reduce the electrostatic charge on the CD without itself becoming charged? What difference does it make if the static charge is on the CD or the foil?

se





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