Gast
Hello,
I use the F07 for developing Fomapan 100 sheet film, which gives me good tonal range and a good maximum density.
The Fomapan 100 200T and 400, on the other hand, show a threshold density well below 0.1 at a dilution of 1:40 and times according to the table, and also only achieve final densities below 1.2.
Is the Calbe R09 better in this respect? Do the developers have similar formulations?
Regards, Thomas
MirkoBoeddecker
Thomas,
Do you mean F09?
There is no difference in the formula between ADOX APH09 (=Calbe R09) and Classic F09.
However, I do know that the main active ingredient in the F09 formula still comes from GDR stocks.
Apparently, the stuff has an indefinite shelf life.
In that respect, the only difference is that the APH09 is fresher.
The Foma films at higher speeds also don’t achieve as high a final density as the 100.
Best regards,
Mirko
Gast
Hello Mirko,
Thank you very much for your reply.
I forgot to mention that when I compared the sheet film to the Foma 100, 200T and 400, I was referring to roll film. The two 100s are comparable in terms of material, aren’t they?
Yet such different final densities with standard exposure and development for the F09?
Here’s another observation of mine regarding the 200T.
Over the course of the last year, I’ve processed 8 films from a delivery by IMPEX (possibly from a single batch). On 3 or 4 of the films, I noticed defects which, when viewed under a microscope, look partly like gaps in the emulsion layer and partly like scratches, but are so small that they cannot actually be caused during development.
The 100 and 400 films have not shown this to me so far.
Are you aware of anything like this?
Is the T-emulsion more sensitive than the 100 or 400?
I no longer dare to use this film, as prints from such negatives are very difficult to retouch, although I am very impressed by the fine grain relative to the speed and when developed in A49.
Regards, Thomas
Gast
Hello,
I’m not a particularly frequent user of FOMA (a matter of taste), but ultimately I can’t say I’ve had any particularly bad experiences with these films.
In any case, it’s certainly not the case that 3 out of 8 FOMA films are unusable, and there are no film manufacturers that consistently produce rejects.
Roland
