SAShruby
8-Aug-2006, 07:51
Efke PL25 or JandC Pro 100 in Pyrocat-HD - Test Results
Yesterday I spent all afternoon testing to be very strange JandC Pro 100 in Pyrocat-HD (I suspect it is Efke PL25). I did five tests. From package identified as JandC Pro 100 (film has single U notch) I took two 8x10 sheets and cut them in total darkness to eight 4x5 sheets. Film was purchased in May 2005, had been in a freezer most of the time, during winter, when I moved to my new house was resting for couple months in temperatures between -20/+15 degrees Celsius.
Tests have been exposed through Deardorff V8 Camera in a specially constructed film holder it can hold one 4x5 sheet film and on top of the film was laid Stouffer 21-step wedge. I used Fuji Fujinon 6.3/360mm lens set at F8. Camera was focused on a Kodak grey card with magnification 1:1. Meter I used was Sekonic L-558Cine. Illumination of the grey card was within 0.3 stops. Measurement had been done on X-rite 361T in UV mode.
Here are the readings and development procedure by tests: Graphs will be posted tonite…
TEST1
Exposure ½ @ f8, ISO100 (Indicated)
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 4 showed B+F @ .114. Oops!!! I forgot to compensate for magnification!!!
TEST2
Exposure 2sec @ f8, ISO100 (Indicated by meter, light changed)
1:1 Magnification compensation: 8sec @ f8 (2 stops)
Reciprocity compensation 32sec @ f8 (2 stops) (according JandC comp chart)
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 11 showed B+F @ .114. This can’t be right. I need to increase recip. comp more!!! And try exposing it at ISO 50
TEST3
Exposure 4sec @ f8, ISO50 (Indicated by meter)
1:1 Magnification compensation: 16sec @ f8 (2 stops)
Reciprocity compensation 2min @ f8 (4 stops)
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 1 showed .925. This can’t be right. What is going on!!! Even more compensation? Even lower ISO?
TEST4
Exposure 8sec @ f8, ISO25 (Indicated by meter)
1:1 Magnification compensation: 32sec @ f8 (2 stops)
Reciprocity compensation 16min @ f8 (5 stops)!!!
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 1 showed 1.721. Step 17 B+F @ .114 Again Even lower ISO? Compensation is 5 stops!!! OK one more
TEST5
Exposure 8sec @ f8, ISO25 (Indicated by meter)
1:1 Magnification compensation: 32sec @ f8 (2 stops)
Reciprocity compensation 64min @ f8 (7 stops)!!!!!!!!
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Finally!!! Step 1 – 2.71, CI 1.47….But I still have room in get higher density!!! One stop more!!! It came out contra sty. I need to lower CI…so I will decrease exposure time to 6 minutes.
So, as you can see claiming to be JandC Pro 100 showed acceptable results exposed according to technical specs maybe at ISO 6.25 with 4 stops recip compensation or ISO12.5 at 5 stops reciprocity. Film has very big tow as well. You will see it tonite when I post charts. I am counting in exposure to temperature changes for 1-2 stops. Am I missing something?
I don’t know, maybe I am wrong in my computations but I do not think I’ve got JandC Pro 100. I think I have Efke PL25
Yesterday I spent all afternoon testing to be very strange JandC Pro 100 in Pyrocat-HD (I suspect it is Efke PL25). I did five tests. From package identified as JandC Pro 100 (film has single U notch) I took two 8x10 sheets and cut them in total darkness to eight 4x5 sheets. Film was purchased in May 2005, had been in a freezer most of the time, during winter, when I moved to my new house was resting for couple months in temperatures between -20/+15 degrees Celsius.
Tests have been exposed through Deardorff V8 Camera in a specially constructed film holder it can hold one 4x5 sheet film and on top of the film was laid Stouffer 21-step wedge. I used Fuji Fujinon 6.3/360mm lens set at F8. Camera was focused on a Kodak grey card with magnification 1:1. Meter I used was Sekonic L-558Cine. Illumination of the grey card was within 0.3 stops. Measurement had been done on X-rite 361T in UV mode.
Here are the readings and development procedure by tests: Graphs will be posted tonite…
TEST1
Exposure ½ @ f8, ISO100 (Indicated)
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 4 showed B+F @ .114. Oops!!! I forgot to compensate for magnification!!!
TEST2
Exposure 2sec @ f8, ISO100 (Indicated by meter, light changed)
1:1 Magnification compensation: 8sec @ f8 (2 stops)
Reciprocity compensation 32sec @ f8 (2 stops) (according JandC comp chart)
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 11 showed B+F @ .114. This can’t be right. I need to increase recip. comp more!!! And try exposing it at ISO 50
TEST3
Exposure 4sec @ f8, ISO50 (Indicated by meter)
1:1 Magnification compensation: 16sec @ f8 (2 stops)
Reciprocity compensation 2min @ f8 (4 stops)
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 1 showed .925. This can’t be right. What is going on!!! Even more compensation? Even lower ISO?
TEST4
Exposure 8sec @ f8, ISO25 (Indicated by meter)
1:1 Magnification compensation: 32sec @ f8 (2 stops)
Reciprocity compensation 16min @ f8 (5 stops)!!!
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Step 1 showed 1.721. Step 17 B+F @ .114 Again Even lower ISO? Compensation is 5 stops!!! OK one more
TEST5
Exposure 8sec @ f8, ISO25 (Indicated by meter)
1:1 Magnification compensation: 32sec @ f8 (2 stops)
Reciprocity compensation 64min @ f8 (7 stops)!!!!!!!!
Development Pyrocat-HD 1:1:100 (500ml used)
8 min, 70F
Trays, 5 sec. agitation every 30 sec.
Stop bath Water Bath
1 min.
Fixer TF-4 alkaline fixer
4 min.
Wash ½ hour
Result: Finally!!! Step 1 – 2.71, CI 1.47….But I still have room in get higher density!!! One stop more!!! It came out contra sty. I need to lower CI…so I will decrease exposure time to 6 minutes.
So, as you can see claiming to be JandC Pro 100 showed acceptable results exposed according to technical specs maybe at ISO 6.25 with 4 stops recip compensation or ISO12.5 at 5 stops reciprocity. Film has very big tow as well. You will see it tonite when I post charts. I am counting in exposure to temperature changes for 1-2 stops. Am I missing something?
I don’t know, maybe I am wrong in my computations but I do not think I’ve got JandC Pro 100. I think I have Efke PL25