[font=Arial][color=navy]OK here's my effort and hoefully someone will correct any errors I make, but the way I soup is correct for my technique.[/color][/font]
[font=Arial]1) The development time looks great, but since I lack the sophisticated densitometer I cannot really offer a scientific opinion if I should develop at a different time next batch. Should I go high a minute or two? Would that really help the image or just kill some highlights? It prints well on grade 2, but I could go grade 3.[/font]
[font=Arial][color=navy]Densitometer? Never owned one and wouldn't know how to use it if I did. LOL - I fill, twist and inverted during the first 60 seconds and then one twist and inversion every 30 seconds. I'd suggest dropping the temp down to 20°C or try dropping 1 to 2 minute(s) from your timing.[/color][/font]
[/font][font=Arial]2) What is the effect of dilution of Rodinal? How does 1-25,50,75,100 changes sharpness, contrast and such?[/font]
[font=Arial][color=navy]Lower dilution does increase the contrast a little. I find 1+50 or 1+100 means that any differences I accidentally introduce to the timings is a lower percentage error giving me more control over the process.[/color][/font]
[font=Arial]3) How long does Rodinal keep in concentrate after the bottle has been opened?[/font]
[font=Arial][color=navy]Absolutely ages even as it turns from straw to very strong "black" coffee.[/color][/font]
[font=Arial]4) Should I have metered at a different speed? All speeds I found on any dev charts where either 400 or 200 asa.[/font]
[font=Arial][color=navy]I've tried HP5+ rated at 200 and liked the look as the grain although still beautiful seems tighter.[/color][/font]
[font=Arial]5) About the fixing temp. The fixer wasn’t new, but I tested it with the Hypo Check. It really surprised me because I lifted the film out at five minutes and was still quite purple. At ten it didn’t look any less purple, but I continued at 12 minutes anyway. What’s up with that? The temp of the fixer must have been about 22 degrees Celcius.[/font]
[font=Arial][color=navy]Not tried this combo so not sure if the colour is significant. I always fix at 20°C but the Rodinal usually clears the base before I fix even when it pours out like grape juice with some films. The Ilford Delta's take about 6 minutes to clear I find at that temp with Ilford Rapidfix 1+4.[/color][/font]
[font=Arial][color=darkslateblue]Welcome to the Rodinal addiction and many thanks for your detailed testing.[/color][/font]
Last edited by TPPhotog; 10-21-2004 at 05:59 PM. Click to view previous post history.
Reason: Silly typo's ... when is this keyboard going to learn to type errrm spell?