Hi all,
Wow, so many kinds answers, thanks you apugers !
I am honored to see my thread was even read by Mr Simon Galley himself !
@georg16nik : It's a good point, humidity, here, is somewhat high in open air, during all the year. I'm living almost in seaside, it's an oceanic climate, after all ! In my basement, where I store the films I need in a short time, humidity oscillate between 60% and 80%. It's rather high, but I try to limit it with an electric deshumidifier appliance, and films are often stored in metal box with a small bag of dessicant. I think to this too, but my whole other 120 and 220 films, branded Fuji, Foma and Adox, never (in the exceptions of one "old" batch of Fomapan) showed these marks, in despite they are not all in an airtight plastic container likes the Rollei.
For the batch number, I can of course share it, on the container, it shows : Batch #670378 exp 03/2014. BTW, I am not new to the Rollei film range, I had already used Retro 100 film in 120, and found it very nice.
@piu58 : I discover this extended sensitivity in IR, on the net, after exposing this film, maybe I should have been more careful when loading this film !
@Mr Galley : thanks you for giving me a name to this phenomenon
In fact, I have no red window on my camera, it's a standard 120 removable back for a Bronica SQ. One in one, I think my problem came from IR, but how ? I don't recall precisely how I loaded the back, it was certainly under attenuated light (not total darkness).
Should I know something about these backs and IR ?
I already used 120 IR film several times, like Ilford SFX200, Efke 820Ir, or Konica 750, with good success but it wasn't with this camera.
@Mustapha : Like Rudy (Rudeofus), I don't throw Rollei cameras and films in the same bag. You find the Rollei films expensive, and you are certainly right, I paid it about 3.70, but 120 Kodak films are almost in a par with this price (3,56 at fotoimpex for Tmax 100) !
Even the Fomapan, which was a few years ago on the cheap, are now well above 3 euros/roll.
@jmdco : In fact, I have a three stage storage process
Long conserved films are in a deep-freezer (under -20°C), I have film in my fridge (under 7°C), and finally in "low" ambiant temperature (in the basement). The later is often used when better half of mine became to rant about the room taken by multicolored small cardboard boxes the fridge
Thanks you again to all, for your useful answers.
Best regards,
Raphael