HC 110 seems to have a upswept curve.
|Dilution from EUROPEAN CONCENTRATE (500 1466)||240 mL|
(1 roll, steel tank)
(1 roll, plastic tank)
(2 rolls, steel tank)
(2 rolls, plastic tank)
|A (1:4)||48 mL||60 mL||96 mL||120 mL|
|B (1:9)||24 mL||30 mL||48 mL||60 mL|
|C (1:5.25)||38.5 mL||48 mL||77 mL||96 mL|
|D (1:11.5)||21 mL||26 mL||38.5 mL||52 mL|
|E (1:14)||16 mL||20 mL||32 mL||40 mL|
|F (1:24)||9.6 mL*||12 mL*||19 mL||24 mL|
|G (1:36.5)||6.4 mL*||8 mL*||12.8 mL*||16 mL*|
|H (1:19)||12 mL*||15 mL*||24 mL||30 mL|
*Be sure to use at least 19.2 mL of European concentrate per 135-36 or 120 roll of film, even if this requires you to put more than the usual amount of liquid in the tank.
Dilutions G and H are unofficial — not described in any Kodak publications. See „Unusual Uses“ below. I use Dilution H as a substitute for Dilution B to give twice the development time.
Dilutions C, D, and E seem to have been designed to match, respectively, the developing times of DK-50, DK-50 1:1, and DK-50 1:2 with sheet film (Carroll, Photographic Lab Handbook, 1979).
With this developer, development time is roughly proportional to dilution. Thus:
|Dilution D||Develop 25% longer than with Dilution B|
|Dilution E||Develop 50% longer than with Dilution B|
|Dilution F||Develop 2.5 times as long as with Dilution B|
I bought mine by Fotoimpex online and got the original concentrate, not the „european“ one.
A test Foma 100 in solution B, 6 minutes, 21C and 10sec every min agitation gave me good results.
Here is a good summary: