KODAK PROFESSIONAL HC-110 Developer is a highly concentrated liquid developer. It is intended for use with a variety of black-and-white films, some graphic-arts films, and some glass plates.
DEVELOPMENT TIMES
We use a dilution of 1/63… or HALF the strength of the official Dilution “B”. This is Dilution “H”. This is done at 24ºC. The reason for this higher temperature is that consistency is the most important aspect of film developing and you just can’t get 20°C water for washing your film here in Singapore. The greater dilution is to enable longer developing times. Longer times allow “plating” to occur (silver reattaching onto film in lower exposure areas- increases micro-contrast in shadows, more and sharper detail) as well as other important but arcane chemical events.
For critical applications, run tests to determine the best development time. If your negatives are consistently too dense or high in contrast, decrease the development time; if they’re too thin or low in contrast, increase the development time.
The following tables offer starting-point recommendations. Adjust as needed.
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Tri-X: @ ISO 200……………. 7 1/2 minutes 400……………. 9 1/2 min. 800…………… 12 1/2 min. 1600…………… 19 min.
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T-MAX 400; Ilford HP-5, Agfapan 400: @ ISO 200…………… 8 min. 400…………… 10 min. 800…………… 13 1/2 min. 1600………….. 20 min.
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T-MAX 100: @ ISO 50……………. 8 min. 100…………… 10 min. 200…………… 13 1/2 min.
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P-3200: @ ISO 800…………….. 9 1/2 min. 1600……………. 14 min. 3200…………… 18 min. 6400…………… 23 min.
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1:63 = one part of developer concentrate to 63 parts of water. This is about the same as
16 ml per liter (10:630, 20:1260). These are starting point suggestions. If your film is too flat (no contrast), increase the time and/or agitation. If the shadows are too thin (no detail) lower your ISO number. Whatever you do, be consistent with temperature. Variations in temperature cause the emulsion to swell or shrink which is really harmful to the grain structure.
The following table tells you how much SYRUP (original HC-110 concentrate) to use to make specific amounts of particular dilutions, the size is usually indicated on the tank:
| Dilution from SYRUP | 240 mL
(1 roll) |
300 mL
(1 roll, plastic tank) |
480 mL
(2 rolls, steel or palstic tank) |
600 mL
(2 rolls, plastic tank) |
| A (1:15) | 15 mL | 18.8 mL | 30 mL | 37.5 mL |
| B (1:31) | 7.5 mL | 9.4 mL | 15 mL | 18.8 mL |
| C (1:19) | 12 mL | 15 mL | 24 mL | 30 mL |
| D (1:39) | 6 mL | 7.5 mL | 12 mL | 15 mL |
| E (1:47) | 5 mL | 6.3 mL | 10 mL | 12.5 mL |
| F (1:79) | 3 mL* | 3.8 mL* | 6 mL | 7.5 mL |
| G (1:119) | 2 mL* | 2.5 mL* | 4 mL* | 5 mL* |
| H (1:63) | 3.8 mL* | 4.7 mL* | 7.5 mL | 9.4 mL |
Dilutions G and H are unofficial — not described in any Kodak publications.
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 |
It takes about 6 mL of syrup to develop one 135-36, 120, or 8×10-inch film without exhausting the developer when complete development is required, perhaps less for compensating development. Thus, when experimenting with extreme dilutions, you may need more than the usual total amount of developer in the tank.
For more details about the developer: http://www.covingtoninnovations.com/hc110/
http://www.digitaltruth.com/devchart.php?Developer=HC-110&mdc=Search&TempUnits=C