TPPhotog said:Morten has cracked the Delta 3200 by shooting at Agfa times - Shoot at 1600 soup for 3200; shoot at 3200 soup for 6400. I've tried it and have some very nice negs.
TPPhotog said:When I have the time I'm going to try HP5+ pushed to 3200 to see how it compares directly with the Delta 3200 @ 3200.
Lee L said:I was reading a Gainer article in PhotoTechniques today testing Rodinal with various forms of sodium. That's another topic, but apropos of this one, he mentions in the last paragraph (Jan/Feb 2002, p. 29) that with Arista D-Max (widely assumed to be Ilford Delta 400 or very similar), at 1+50 70F and 6 minutes he got a CI of 0.41, and at 12 minutes a CI of 0.53. He estimates that maximum achievable CI would be around 0.61 with Rodinal 1+50 and Arista D-Max. You may be hitting that limit if the films really are the same.
One form of sodium he tried in his tests was sodium ascorbate at 4 grams/liter, which was superadditive with the Rodinal and gave finer grain. With that combination, he diluted 1+50 and developed at the times for 1+25. Gainer doesn't mention it, but that could help with Delta 400 in Rodinal.
Lee
The main intent of the exercize was to find exactly how different forms of sodium affected grain in Rodinal and D-23, testing some long-standing assumptions. He tried sodium chloride (non-iodized), sodium sulfite, and sodium ascorbate to test how they affected grain. He also expected, I'm sure, to get increased activity with the sodium ascorbate, but it was also the "best" at both retaining acutance and producing finer grain. Sodium for fine grain, ascorbate for superadditivity. On both counts it might help with HP5+.titrisol said:Yes, Mr.Gainer is an expert in "perverting" developers by adding ascorbate.
In this case it has nothing to do with sodium, but with the ascorbic acid itself (Vit-C)
Interesting... Have you tried benzotriazole in this mix rather than sodium sulfite to cut the base fog with less disolving of silver grain edges?titrisol said:Yes Lee, adding a pinch of ascorbate to Rodinal helps a lot.
Specially with Tri-X and other fast films.
Some added fog-base is present, but adding some sulphite also eliminates these.
titrisol said:not really, my chemical pool is small these das and I haven;t got any Benzo.
TPPhotog said:Morten has cracked the Delta 3200 by shooting at Agfa times - Shoot at 1600 soup for 3200; shoot at 3200 soup for 6400. I've tried it and have some very nice negs.
I have only just joined this site, having had exactly the problems exactly you anticipate with D 400. I shot a roll of D400 at a christening. I used a 1:50 dilution and the times Ilford recommend for rotary processing for D400 and Rodinal. The indoor negs were very thin and quite grainy although the outside shots were better albeit still a little thin. I wrote to Ed Buffalo at unblinkingeye.com. His recommendations were to rate D400 at 200 and use a minimum of 5mls of Rodinal to achieve a ratio of 1:50. I had processed in a Jobo rotary processor which he said probably accounted for the grain due to extra agitation as well as destroying the edge effect renown with Rodinal. So a hand tank is the preferred option with Agfa's recommended agitation.thefizz said:I am trying out Delta 400 in Rodinal for the first time and want to know if I can trust the developing info provided by Ilford, i.e., 1:25 at 20C for 9 minutes.
I recently had the problem of thin negs when developing Delta 3200 in Rodinal as per Ilford instructions so will I have a similar problem with Delta 400.
Regards,
Peter
modafoto said:This a VERY nice rule...Maybe a trial with Delta 400 is coming soon (shot @ 400, deved @ 800). I haven't done this film in Rodinal for some time, so it would be interesting
FrankB said:Just a thought, Morten; not sure about Rodinal but in DD-X Ilford's recommendation of ISO 500 and 9 mins works really nicely for me!
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