Can Polaroid 667 690 664 be bleaching negative？

[captain ZZM]

I can bleached and got negative from FP-100C, the negatives can be scanning or enlarging for b/w print（not the best but better than RA-4 color print）.
However when l bought a Polaroid 669 film, it can be used but l find the negative cannot bleaching to get image. The 667 664 and 690 is similar or not？

 

[winger]

As far as I know, only the FP-100C works to recover the negative by bleaching. Even the other Fuji ones didn't do it. I haven't tried any others myself, though, so I don't know if there is a way.