CD/DVD Demagnetization

visit :
http://www.gcaudio.com/resources/howtos/demagnetization.html

i think it's true
all of my album loose the fresh sound after some playing
what's your idea?

 

Classic stuff: a non-working solution to a non-existent problem.


Regards,

L.

 

Quite. Small spherical objects, would be my comment.

 

Couldn't you just by new copies of the CDs for that price?

 

i think we can build this stuff by hand

 

Some people have found this to work. I have not, though but that doesn't mean that this effect doesn't exist. I have found I can hear the difference with the XLO demag tracks that do you cables and system though.

 

However, the inks used to print the labels have been found to contain elements such as Iron, Nickel and cobalt, which are indeed easily magnetized. Further, while the substrate is 99% aluminum, it may also contain small amounts of the ferrous material listed above.
Although this is total and utter hogwash, it keeps being repeated.

(a) Iron, nickel and cobalt do occur in printing inks, but they are not particularly common.

(b) They are present not as metals but as compounds, and as compounds their magnetic properties are altered. For example, only one of the oxides of iron, the double oxide magnetite (never used in conventional printing inks, by the way), is ferromagnetic (able to be magnetised). The much more common ferric oxide (a.k.a. rust) is not at all magnetic.

(c) I love the hedge - aluminium "may" contain small amounts of the ferrous material. In fact, any such impurities are 'way lower than that. One of the first thing they do with bauxite (aluminium ore) is get rid of the iron:

http://www.webelements.com/webelements/elements/text/Al/key.html

Pure aluminium is then made electrolytically, which gives a very high purity. The aluminium used in CDs is very pure (probably the purest commercial grade, 99.99%).

And, yes, I have tried demagnetising my CDs and yes it doesn't work.

 

bugger never thought of that !

 

The Aluminium in CD discs is vapor-deposited, it's deposition rate being an exponential function of temperature above the evaporation point of aluminum and thus the temperature of the aluminum source has to be, and if I may say, is easily controlled to a high degree of accuracy.
If iron was present in the vapor source, the fact that iron's vaporization temperature (3135 deg C) is some 340 deg C higher than that of aluminum (2795 deg C) precludes any such contamination.

 

Is this the same thing as the Bedini Clarifier?

 

Don't think so:
http://www.bedini.com/
Bedini's guff mentions "electromagnetic beams" (which could mean he has torch bulbs in there), as opposed to demagnetising.

One of Mr. Bedini's other claims to fame is the devising of perpetual motion machines, which gives you some idea of the trustworthiness of his ideas. He has even patented some, getting round the USPTO's instructions to its examiners to refuse all such patent applications by heavily disguising them and naturally never using anywhere the words "perpetual" and "motion".