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more: emilytebbetts.blogspot.com/2012/01/large-format-photograp...
A test shoot with Mia yesterday to test out my large format camera with instant back. I'm in love with it :)
paper scan fomabrom n115/ spur se1 sepia 1+9 90"
rollei rpx400 @800 / spur speedmajor
rolleicord â… model2 511 triotar 3.8
Viewing Large on Black is a MUST!!!!
Sinar F2 + Rodenstock Sinaron-N 210mm/5.6
Exposure 1/200sec f8.0 ISO 1500
Film: POLAROID SEPIA GIAMBARBA EXPIRED
Scanned from print with Epson 4870
Graflex "Pre Anniversary" Speed Graphic / C.P. Goerz Berlin Dagor 12.5cm f6.8 / Rollei Retro 100 Tonal (Caffenol C-M(RS) 16℃ 20min 44sec)
So I've now developed my first test roll of FP4+ for 510-Pyro, using RZ67.
This was at box speed, following published dev time of 10mins at 20ºC. I screwed up the last frame in the sequence, so the bottom row frames here are the same (the last one should be a stop darker for Zone 10).
I was hoping to make an argyrotype of this today to confirm, but I've compared this against my set of test negs for Pyrocat HD and I think the film speed is OK actually, at 125 (as opposed to 64 which I used for PyrocatHD) but, even with the extra zone 10 exposure here, I still think I could go a stop up in the development time, so N+1 would be N for a bit more expansion in the highlights. So perhaps 12'15".
Will try to expose and process some 10x8 sheets and see. Not a particular hardship if they don't quite work for argyrotype because they'll scan fine.
Quick thoughts on the difference in use between the two developers.
1) I'm v glad to not have to do the extra steps that I've been doing with PyrocatHD, e.g. using a v weak acetic acid stop bath, and a hypo clear step (though tbh I don't think either of these were either totally necessary or desirable).
2) I wish 510-Pyro was less gloopy and messy and more easily mixed in (for Pyrocat HD in glycol I happily used a 5ml measure for both parts as opposed to a cumbersome syringe process, which I started with for Pyrocat but ditched. 510 is far too gloopy to afford this convenience it seems).
3) The stain seems good to me!
4) Looking forward to making a better fixer. Since I've run out of TF4, I've been using my own alkali hypo+soda mix, but this easily runs past 10mins fixing time (this was the second run for this lot of fixer and the clearing time was 7 minutes, starting at 5mins). I could use Ilford Rapid Fixer but don't want to reduce the stain particularly.
Also NB pink tinge is a reminder to wash the negs properly (I just did these using Ilford method, which isn't enough, clearly). If the tinge is still there after 10 cycles of water, then I'll reintroduce the hypoclear step maybe.