Tandemfahren
Hello everyone, hello management,
On 16 July, a certain M. Boeddecker wrote on APUG that the new Adotech II developer was “only a few days away from its release”.
I am hereby stamping my feet in the most public manner possible!
Because I now have a few rolls of 120 CMS20 in the fridge, waiting to be used, and it would be more than desirable to achieve ideal characteristics with them.
The poor results put me off this otherwise lovely film at the time (despite some sensationally beautiful shots).
When, when?
Regards,
Frank
MirkoBoeddecker
Hi Frank,
We came up with a few good ideas at the last minute, which meant we had to do a bit more testing.
These were mainly capacity calculations. For KB, we have this set of five with one bottle of developer.
As a roll film requires more liquid to be completely covered with developer in the canister, it would only have been possible to develop two roll films with one bottle. That would, of course, be a significant price disadvantage for the roll film compared to KB film.
So we tweaked the stability of the diluted developer, meaning that two roll films can now be developed one after the other with a single batch.
We have also increased the concentration slightly so that a total of three batches of 500ml each can now be mixed, each of which develops two films. That makes a total of six roll films per bottle, although we advise against using the last film. The last batch has surely often oxidised a little in the bottle; then it is highly diluted, has to develop one film, is supposed to wait for the second, and then has to be used again. That’s where things get a bit tricky with the extension factors.
But if you can manage 6 films in a day, then you can.
The tests are now complete and the developer is going into production.
Best regards,
Mirko
Tandemfahren
Halle,
That sounds very promising. Up until now, I’ve always developed two 120s at a time in a half-litre bottle (that should still work, shouldn’t it?), but this is obviously more flexible.
Although ‘one after the other’ probably means ‘in quick succession’ – a solution that thin is likely to die out quickly.
Good luck
Frank
