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The Rollei RPX-D developer, for a new developing method in combination with
the new b&w film Rollei RPX 400.
- Uses the nominal sensitivity 400 ASA perfectly.
- Rollei RPX-D offers high quality results when pushing (underexposing),
expands the range from 400 up to 3200 ASA.
- With a convincing high quality, because even at the range from 800 up to
1600 ASA there are no changes of the tonal value visible.
- From 3.200 ASA and more, the grain increases but the tonal value does not
decrease visibly.
- Rollei RPX-D offers for this sensitivity an unsually high edge sharpness.
Rollei RPX 400 in combination with Rollei RPX-D developer:
Exceptionally for this developer are the different fill in temperatures.
It is not necessary to keep up a constant temperature level during
development if the room temperature is at about 20°C / 68°F.
Agitation: First 30 seconds permanently, then one sweep every 30 seconds.
| ISO |
Dil. |
Temp. |
Time |
Dil. |
| 400/27° |
1+11 |
20°C |
11 min |
20ml + 230ml = 250ml |
| 800/30° |
1+7 |
22°C |
13 min |
31,3ml + 218,7ml = 250ml |
| 1600/33° |
1+5 |
24°C |
14 min |
41,5ml + 208,5ml = 250ml |
| 3200/36° |
1+4 |
25°C |
15 min |
50ml + 200ml = 250ml |
Capacity
5x 135-36/120 exposed to 3200/36°
6x 135-36/120 exposed to 1600/33°
8x 135-36/120 exposed to 800/30°
12x 135-36/120 exposed to 400/27°
Development times
| Film |
Dil. |
Temp. |
Time |
Dil. |
| Rollei RPX 100 |
1+15 |
20°C |
6-6,5 min. |
20ml + 230ml = 250ml |
| Ilford Delta 100 |
1+19 |
20°C |
6,5-7 min. |
31,3ml + 218,7ml = 250ml |
| Fuji Acros 100 |
1+19 |
20°C |
7,5 min. |
41,5ml + 208,5ml = 250ml |
| Kodak TRI-X 400 |
1+9 |
20°C |
6,5 min. |
50ml + 200ml = 250ml |
| Kodak T-MAX 400 |
1+15 |
20°C |
7,5 min. |
50ml + 200ml = 250ml |
"RPX400 / RPX-D - A high ASA combination ?" By Uwe Pilz
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