- Joined
- Feb 19, 2011
- Messages
- 43
- Format
- 35mm
I have a couple ATP 1.1 starter kits (roll of 35mm film, 20mL Rollei ATP DC developer, and fixer). The instructions say to mix 20mL developer with 230mL water (250mL total) for a 1+11.5 dilution. My Patterson tank suggests using 290mL, so to avoid potentially ruining the top/bottom of every frame on the roll I diluted to 1+13.5 and followed the rest of the directions accordingly, but I did not adjust the development time. In general the negatives look very good overall. However, they seem to be far more underdeveloped than expected. I bracketed a lot, and it looks like the best frames were at roughly EI 12. According to the info packet the ATP DC developer should yield EI 32-40. Is that much of a shift expected when effectively the only difference is a ~7% dilution vs the recommended 8% dilution?
Can I get away with using only 250mL in the Patterson tank in order to use the suggested 1+11.5 dilution, or should I repeat with 1+13.5 and extend development time a little...7 minutes instead of 6? Maybe 8 minutes?
The second roll I shot was also bracketed but this time more in the range of ~8-32 rather than ~12-40. Assuming I do everything exactly the same this roll should turn out fine, but I'm still curious about this because I'd love to use this film more in the future.
Can I get away with using only 250mL in the Patterson tank in order to use the suggested 1+11.5 dilution, or should I repeat with 1+13.5 and extend development time a little...7 minutes instead of 6? Maybe 8 minutes?
The second roll I shot was also bracketed but this time more in the range of ~8-32 rather than ~12-40. Assuming I do everything exactly the same this roll should turn out fine, but I'm still curious about this because I'd love to use this film more in the future.

but I'll add it to my list. It sounds promising if DC does not produce the results I want.
