Are there also directly Philips/PDM cassettes with black superferro tape?
There are more mysteries.
For example, why there is very little tape in the Basf Metal Pigment C60 on internet cassette, as if it were made from C90.
And why there is just as little tape in the Philips Metal C60 cassette. But in the Philips Metal C46 it is already fine.
https://ez647.sk/cc/philips_metal.html
Photos, C60:
I looked at my notes
PDM Tri Oxide Ferro version 1981 is medium light brown with a mottled pattern
the 1983 version is black
The 1983 HG version is medium brown, but I don't have it listed if it's identical to the 1981 version
There are more mysteries.
For example, why there is very little tape in the Basf Metal Pigment C60 on internet cassette, as if it were made from C90.
And why there is just as little tape in the Philips Metal C60 cassette. But in the Philips Metal C46 it is already fine.
https://ez647.sk/cc/philips_metal.html
Photos, C60:
I looked at my notes
PDM Tri Oxide Ferro version 1981 is medium light brown with a mottled pattern
the 1983 version is black
The 1983 HG version is medium brown, but I don't have it listed if it's identical to the 1981 version