I’ve just been reading about a new French made blank, based on an old formula. I’d love to know if anyone has used or has information! This video is quite good And they are on sale here https://www.recordingthemasters.com/store/audio-cassettes/fox-c60-type-1/
That's a really fair price too if they got quality, considering how expensive other tapes like Maxell UR got these days. Thanks a lot for sharing!