HC 110 seems to have a upswept curve.
| Dilution from EUROPEAN CONCENTRATE (500 1466) | 240 mL (1 roll, steel tank) | 300 mL (1 roll, plastic tank) | 480 mL (2 rolls, steel tank) | 600 mL (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: