Slowakische Kassettensite mit allen Einlegern

[EZ647]

I thought the Elite would be SKM FeCo (QX) over the years and batches I have found different shades of this tape, as well as different distinct tapes on SKC GX and LX models over the years
Magnex chrome and Studio 2 I confirm, it is indeed FeCo, often in shell with type I detection, or vice versa

GreenCorp problems
A friend purchased about 10pcs of C46 for vinyl recordings, after a few months they could not be used anymore
https://ez647.sk/cc/philips_fxferro.html

From my collection:
exhibited a squeak during recording, in both pieces:
https://ez647.sk/cc/victor_rz.html#92
https://ez647.sk/cc/victor_rz.html#96

This one stops as soon as the leader tape finishes, tried on various tape decks and walkmans
https://ez647.sk/cc/jvc_af1.html#92

Some old Philips CD One's still work fine for me, also other Philips Audio Cassettes with GreenCorp tape
I haven't recorded other new ones, I may have noticed problems during my tests, but there are too many to check it all now

in addition, the problem of sticking is very often starting to occur on some SKC/Smat ferro pieces, or Sony CDix I from the last series where Tape Korea is listed, so I assume SKM

I also have a prerecorded audiotape where there was a big problem playing, but with alcohol/IPA cleaning I got it moving a bit, but running is still a problem
https://ez647.sk/cc/orig_i/b/sgi.jpg
claims Made in Holland, but the tape is dark, not like normal prerecorded audiotapes where there is a light basf

Regards EZ

supplemented: the problems with GreenCorp are on the light to darker brown strips
No problem with black tapes ones yet