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#1
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Rodinal
Hi all,
Rodinal is not available in Turkey. I believe it is because in part Agfa's low profile marketing strategy. Anyway, I read a lot about Rodinal and decided to try it. I bought some rodinal in the U.S and am ready to give it a shot. It is half a liter bottle of Rodinal. I was hoping that it has a long shelf life like the T-Max developer I mainly use and bought the larger bottle. T-Max developer has a shelf life of 2 years in proper conditions. As I do not develop not more than 1-2 rolls of film in a week, shelf life is important to me. In the leaflet of rodinal, it says once the original bottle has been opened, the stock will keep for 6 months. I know Rodinal is very concentrated like the T-Max and I am wondering if keeping the stock rodinal in air tight brown glass bottles (trying not to leave any air in the bottles by moving the stock in smaller bottles as it is consumed) will help extend the life of stock rodinal over 6 months. I have another question. I use 300 ml of working solution to develop 35 mm. films. the 1+50 dilution requires really little amounts of stock developer. Is there a threshold for the stock amount to be used, any minumum limits? Thank you all for helping me. Kind regards, Alparslan |
#2
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Rodinal
"Alparslan" wrote
Rodinal ... shelf life [?] Seems to be forever. Usable even when it has turned black. keeping the stock rodinal in air tight brown glass bottles (trying not to leave any air in the bottles by moving the stock in smaller bottles as it is consumed) [?] Would be a waste of time and will not increase the shelf life as not one seems to have come up with a bottle of Rodinal that is so old it no longer works. Is there a threshold for the stock amount to be used, any minumum limits? 11 ml/80 sq in = ll ml/36exp-35mm /120 /4-4x5" Success is reported at 7ml, anything lower and negatives get thin. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ |
#3
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Rodinal
Nicholas O. Lindan wrote:
"Alparslan" wrote Rodinal ... shelf life [?] Seems to be forever. Usable even when it has turned black. keeping the stock rodinal in air tight brown glass bottles (trying not to leave any air in the bottles by moving the stock in smaller bottles as it is consumed) [?] Would be a waste of time and will not increase the shelf life as not one seems to have come up with a bottle of Rodinal that is so old it no longer works. I had one of the plastic Rodinal bottles that leaked. Hydroxide spills are not fun. Bert |
#4
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Rodinal
On Sat, 20 Mar 2004 00:53:52 +0200, "Alparslan"
wrote: Hi all, Rodinal is not available in Turkey. I believe it is because in part Agfa's low profile marketing strategy. Anyway, I read a lot about Rodinal and decided to try it. I bought some rodinal in the U.S and am ready to give it a shot. It is half a liter bottle of Rodinal. I was hoping that it has a long shelf life like the T-Max developer I mainly use and bought the larger bottle. T-Max developer has a shelf life of 2 years in proper conditions. As I do not develop not more than 1-2 rolls of film in a week, shelf life is important to me. In the leaflet of rodinal, it says once the original bottle has been opened, the stock will keep for 6 months. I know Rodinal is very concentrated like the T-Max and I am wondering if keeping the stock rodinal in air tight brown glass bottles (trying not to leave any air in the bottles by moving the stock in smaller bottles as it is consumed) will help extend the life of stock rodinal over 6 months. In a thread elsewhere I read that a spray called Protectan to preserve developers consists of propane and/or butane. So if you have a butane refiller for cigarette lighters a quick squirt of that into the bottle after use does work to prevent oxygen from getting to the developer. The person doing the experiment has tried it on developers that discolor as they oxidised and reports the developer was perfectly clear after 6 months of storage. Use all precautions for flammable materials when using this. |
#6
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Rodinal
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#7
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Rodinal
"Nicholas O. Lindan" wrote
Success is reported at 7ml, anything lower and negatives get thin. I mentioned a 10ml minimum a couple of years ago and was soon set straight. IIRC, 3ml give or take a little was bottom. Formulary Rodinal's minimum is 3.5ml. The only developing agent in Rodinal is p-aminophenal hydrochloride. Is that similar to metol? Do you think it might be activated by a carbonate? I wonder why it is not more used? Dan |
#8
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Rodinal
In article ,
(Dan Quinn) wrote: I mentioned a 10ml minimum a couple of years ago and was soon set straight. IIRC, 3ml give or take a little was bottom. Formulary Rodinal's minimum is 3.5ml. The only developing agent in Rodinal is p-aminophenal hydrochloride. Is that similar to metol? Do you think it might be activated by a carbonate? I wonder why it is not more used? Dan At high dilutions its an excellent choice. With certain films and the suggested higher concentrations it can produce contrasty negatives. Perhaps if Agfa published the detailed charts they do using 1+7 ? Using 1+50 less people would try and then perhaps intially dislike it. It can do beautiful things, I say go for the Carbonate....let us know !!! Maybe try it with Metaborate ? BoraX? -- LF website http://members.bellatlantic.net/~gblank |
#9
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Rodinal
In article , Gregory W Blank
wrote: In article , (Dan Quinn) wrote: I mentioned a 10ml minimum a couple of years ago and was soon set straight. IIRC, 3ml give or take a little was bottom. Formulary Rodinal's minimum is 3.5ml. The only developing agent in Rodinal is p-aminophenal hydrochloride. Is that similar to metol? Do you think it might be activated by a carbonate? I wonder why it is not more used? Dan At high dilutions its an excellent choice. [...] In fact, at 1:200 in a tank with all the reels full of film, _all_ films develop to approximately N-1 to completion using the same developing time: any time over 50 minutes. |
#10
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Rodinal
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