Yves Gauvreau
28-Nov-2004, 12:01
I bought this film #3412 in 5" roll to experiment with a 4x5 and readed a few of technical papers from Kodak and others and from some folks here and elsewhere. Ansel Adams book "The negative" mention a film with the same name but I presume it's a different beast.
I started testing the film using HC110 with 1:15 dilution from stock for 8.5 minutes as suggested in Ansel Adams book. The first test was to determine speed and found that ISO 12 gave me about zone I with close to 0.1 density. Then I tried to get the proper time for zone VIII. My first result gave me a density around 2.2 so I had to bring down the time to about 4 minutes to get a density of about 1.3.
Obviously, from this data one can see that I could easily get expension to about N+3 or more but my problem would be to get contraction or N minus. It seems bizarre to me that I get these kind of numbers when I see others reporting they use EI around 32 and using HC 110 dilution B or Rodinol for around 4.5 minutes. I also saw some using Pyro with about the same EI and times.
I'd like to be able to shoot this film at the highest possible EI say 32 and be able to do expension of at least 1 or 2 zone but mostly, since I think expension wont be a problem, contraction of a couple zone as well. I'll test also the 2 bath method to get even less contrast later.
I devellop in 8x10 trays at most 2 negs at a time and turn them upside down every 30 sec. and push them down so they don't float on the surface. I use a Gossen Lunapro F with a fiber optique probe for density and exposure measures. I check it against my D70 on spot metering and they seem to agree quite well. I use a very large tray of water at 68 F to provide constant temperature. Lastly, I use only fresh chemicals.
I'd like to know what I did wrong if I did? What if I use HC 110 dilution B for 4.5 minutes as a starting point, could this help raising the effective EI and still provide room for contraction? Should I forget contraction all together and experiment with Pyro and or 2 bath method instead because of the short times involded?
Thanks to you all
I started testing the film using HC110 with 1:15 dilution from stock for 8.5 minutes as suggested in Ansel Adams book. The first test was to determine speed and found that ISO 12 gave me about zone I with close to 0.1 density. Then I tried to get the proper time for zone VIII. My first result gave me a density around 2.2 so I had to bring down the time to about 4 minutes to get a density of about 1.3.
Obviously, from this data one can see that I could easily get expension to about N+3 or more but my problem would be to get contraction or N minus. It seems bizarre to me that I get these kind of numbers when I see others reporting they use EI around 32 and using HC 110 dilution B or Rodinol for around 4.5 minutes. I also saw some using Pyro with about the same EI and times.
I'd like to be able to shoot this film at the highest possible EI say 32 and be able to do expension of at least 1 or 2 zone but mostly, since I think expension wont be a problem, contraction of a couple zone as well. I'll test also the 2 bath method to get even less contrast later.
I devellop in 8x10 trays at most 2 negs at a time and turn them upside down every 30 sec. and push them down so they don't float on the surface. I use a Gossen Lunapro F with a fiber optique probe for density and exposure measures. I check it against my D70 on spot metering and they seem to agree quite well. I use a very large tray of water at 68 F to provide constant temperature. Lastly, I use only fresh chemicals.
I'd like to know what I did wrong if I did? What if I use HC 110 dilution B for 4.5 minutes as a starting point, could this help raising the effective EI and still provide room for contraction? Should I forget contraction all together and experiment with Pyro and or 2 bath method instead because of the short times involded?
Thanks to you all