Carbon black impurities is what the Absolute Sound press lazily tries to blame for magnetism.
Furutech website:
From IARC monographs
The easiest criticism is the price of the unit, which is product of marketing. Consumer behavior is what makes audiogon interesting in lew of actually learning about audio.
Furutech website:
The fact is that pigment added to the plastic during the manufacturing process is the culprit. The minute amount of ferrous material in the pigment causes LPs to become magnetized. Testing at the Tokyo Nanotechnology center with a IHI Gauss meter showed that after an LP was treated with the deMag the magnetic field of the LP was lowered from 620~630 nT to 572~582 nT (nanotesla: a unit of magnetic field strength,1 Tesla = 10,000 gauss)Earth's magnetic field is 50,000nT.
From IARC monographs
Carbon black that is made from high-sulfur feedstocks frequently contains detectable quantities of extractable aromatic compounds that contain sulfur such as benzothiophene derivatives (Lee & Hites, 1976; Nishioka et al., 1986). Trace amounts of a variety of inorganic elements (e.g. calcium, copper, iron, manganese, potassium, lead, arsenic, chromium, selenium and zinc) have also been identified in some analyses of samples of carbon black (Collyer, 1975; Sokhi et al., 1990; Cabot Corporation, 2005b)I am skeptical about how trace ferrous metals can get and stay magnetized over a record, or have a geometry that creates a magnetic field large enough to disturb a cartridge. That may be reflected in the nanotesla scale numbers.
The easiest criticism is the price of the unit, which is product of marketing. Consumer behavior is what makes audiogon interesting in lew of actually learning about audio.