What did I do wrong with this B&W reversal?

[flavio81]

It is correct that the base on the 135 version is tinted. Some people may find this to be an issue. Some won't. It's not a particularly dark base, or strongly tinted.

I've not found too much difference in base between Fomapan 100 and the Ilford films.

Perhaps they have changed the base. Last time i used Fomapan 100 was long ago and I recall the base being not too clear.

 

[flavio81]

All films can be reversed and some give better results than other. However, some films couldn't be run through the vastly famous Dr5 process and hence might have wrongly earned the reputation of being unsuitable for reversal.

From https://www.dr5.com/blackandwhiteslide/filmreviewdev1.html

The following below films are not recommended or CANNOT be run through the dr5-process:
FOMAPAN-100 & 400 • ALL SHANGHI • FUJI-ACROS100 • COPEX/ADOX-20
APX-400 & 25 • ALL C41-XP2

Yes, I was following DR5's advice when I wrote that Fomapan 100 is "said" to be not good for reversal.

 

[Ivo Stunga]

I bet @Ivo Stunga has tried reversal processing F100. He's put a heck of a lot more time into this than I ever have.

Indeed I have and I like the old-school feel of this film. I like it even better than R 100 - reversed both in Foma kit or PQ Universal/Ilford.


I find the density of the base a non-issue.
If you project - sure, the slides are a tad darker (base acts as a weak ND filter), but that's almost imperceivable if you don't have a clear base slide next to it to compare to. If you scan it - no problems whatsoever with well exposed and developed slides. I suggest to ignore the base density and go for film properties instead. More fun, more options. Currently I have HP5+ @1600 in my camera...

Up to this point I only had trouble reversing unknown age mystery soviet tech film with a green coating. Everything goes and at EI you want - no strange "shoot this film at EI X to be compatible with our services" BS.

You can even reverse C-41 and E-6 films if you want to do so.