|
| If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|||||||
|
|
Thread Tools | Display Modes |
|
#31
November 21st 04, 12:17 AM
|
|||
|
|||
Lloyd Usenet-Erlick Lloyd at @the-wire. dot com wrote
In addition, if we want traditional darkroom activity to survive, the next generation should get a good impression when they visit someone's darkroom. If I show some kids my darkroom when they come by with their mothers for a portrait, I don't want Mom's nose getting bitten by 'fumes'. Those kids probably wouldn't become darkroomies. They "should get a" CORRECT impression also. Even Dr. Gudzinowicz hedges his distrust of other than the seventy or eighty year old acid stop/acid fix method to "very alkaline" post developer processing. I'd suppose that concern also extends to "very alkaline" developers. The doctor worries' are of the effects very alkaline solutions can have on today's hardener incorporated emulsions, physical development from developer carry over into a continuing alkaline environment, and swelling of the gelatin due to osmosis when water "stoping". I don't buy that last one perhaps because I've a background in physics. As I've pointed out acid-stops are 98%, give or take, H2O. So we have a 98:2 ratio and fast small H20 molecules verses larger slower acid molecules. I think the shoe fits equally well as for swell, water or acid stop. Also the doctor's concerns center about solutions of high ionic strength, ie D76 and Dektol, 1:1, and of course fixers used at the usuall strengths, acid or otherwise. That is, emulsions moved from such fixers to water or hca baths will experience osmotic swell. My experience with film and paper and the fact that developer and fixer and emulsions do coexist in mono-baths and P. Gainers own testimony leave me to doubt there is any problem with physical development. I use all photographic chemistry one-shot and very dilute. I don't worry about any of the above. Nor are there any bothering fumes or oder thanks to the chemistry's non-acid nature. Dan 
|
|
#32
November 21st 04, 12:17 AM
|
|||
|
|||
|
Lloyd Usenet-Erlick Lloyd at @the-wire. dot com wrote
In addition, if we want traditional darkroom activity to survive, the next generation should get a good impression when they visit someone's darkroom. If I show some kids my darkroom when they come by with their mothers for a portrait, I don't want Mom's nose getting bitten by 'fumes'. Those kids probably wouldn't become darkroomies. They "should get a" CORRECT impression also. Even Dr. Gudzinowicz hedges his distrust of other than the seventy or eighty year old acid stop/acid fix method to "very alkaline" post developer processing. I'd suppose that concern also extends to "very alkaline" developers. The doctor worries' are of the effects very alkaline solutions can have on today's hardener incorporated emulsions, physical development from developer carry over into a continuing alkaline environment, and swelling of the gelatin due to osmosis when water "stoping". I don't buy that last one perhaps because I've a background in physics. As I've pointed out acid-stops are 98%, give or take, H2O. So we have a 98:2 ratio and fast small H20 molecules verses larger slower acid molecules. I think the shoe fits equally well as for swell, water or acid stop. Also the doctor's concerns center about solutions of high ionic strength, ie D76 and Dektol, 1:1, and of course fixers used at the usuall strengths, acid or otherwise. That is, emulsions moved from such fixers to water or hca baths will experience osmotic swell. My experience with film and paper and the fact that developer and fixer and emulsions do coexist in mono-baths and P. Gainers own testimony leave me to doubt there is any problem with physical development. I use all photographic chemistry one-shot and very dilute. I don't worry about any of the above. Nor are there any bothering fumes or oder thanks to the chemistry's non-acid nature. Dan
|
|
#33
November 21st 04, 02:13 AM
|
|||
|
|||
|
Dan Quinn wrote: Lloyd Usenet-Erlick Lloyd at @the-wire. dot com wrote In addition, if we want traditional darkroom activity to survive, the next generation should get a good impression when they visit someone's darkroom. If I show some kids my darkroom when they come by with their mothers for a portrait, I don't want Mom's nose getting bitten by 'fumes'. Those kids probably wouldn't become darkroomies. They "should get a" CORRECT impression also. Using words like "correct" and "virtuous" to describe or promote individual preferences in darkroom proceedures borders on the religious.. I also have no bothering fumes. Use glacial acetic and A. thio non-hardened. Never even smell it unless I stick my nose right in the solution. Course I also have very good ventilation since I also like fresh air and filtering dust. I think most moms would prefer that, knowing their child is in an OSHA aafe environment :-) Even Dr. Gudzinowicz hedges his distrust of other than the seventy or eighty year old acid stop/acid fix method to "very alkaline" post developer processing. I'd suppose that concern also extends to "very alkaline" developers. The doctor worries' are of the effects very alkaline solutions can have on today's hardener incorporated emulsions, physical development from developer carry over into a continuing alkaline environment, and swelling of the gelatin due to osmosis when water "stoping". I don't buy that last one perhaps because I've a background in physics. As I've pointed out acid-stops are 98%, give or take, H2O. So we have a 98:2 ratio and fast small H20 molecules verses larger slower acid molecules. I think the shoe fits equally well as for swell, water or acid stop. Also the doctor's concerns center about solutions of high ionic strength, ie D76 and Dektol, 1:1, and of course fixers used at the usuall strengths, acid or otherwise. That is, emulsions moved from such fixers to water or hca baths will experience osmotic swell. My experience with film and paper and the fact that developer and fixer and emulsions do coexist in mono-baths and P. Gainers own testimony leave me to doubt there is any problem with physical development. I use all photographic chemistry one-shot and very dilute. I don't worry about any of the above. Nor are there any bothering fumes or oder thanks to the chemistry's non-acid nature. Dan
|
|
#34
November 21st 04, 02:13 AM
|
|||
|
|||
|
Dan Quinn wrote: Lloyd Usenet-Erlick Lloyd at @the-wire. dot com wrote In addition, if we want traditional darkroom activity to survive, the next generation should get a good impression when they visit someone's darkroom. If I show some kids my darkroom when they come by with their mothers for a portrait, I don't want Mom's nose getting bitten by 'fumes'. Those kids probably wouldn't become darkroomies. They "should get a" CORRECT impression also. Using words like "correct" and "virtuous" to describe or promote individual preferences in darkroom proceedures borders on the religious.. I also have no bothering fumes. Use glacial acetic and A. thio non-hardened. Never even smell it unless I stick my nose right in the solution. Course I also have very good ventilation since I also like fresh air and filtering dust. I think most moms would prefer that, knowing their child is in an OSHA aafe environment :-) Even Dr. Gudzinowicz hedges his distrust of other than the seventy or eighty year old acid stop/acid fix method to "very alkaline" post developer processing. I'd suppose that concern also extends to "very alkaline" developers. The doctor worries' are of the effects very alkaline solutions can have on today's hardener incorporated emulsions, physical development from developer carry over into a continuing alkaline environment, and swelling of the gelatin due to osmosis when water "stoping". I don't buy that last one perhaps because I've a background in physics. As I've pointed out acid-stops are 98%, give or take, H2O. So we have a 98:2 ratio and fast small H20 molecules verses larger slower acid molecules. I think the shoe fits equally well as for swell, water or acid stop. Also the doctor's concerns center about solutions of high ionic strength, ie D76 and Dektol, 1:1, and of course fixers used at the usuall strengths, acid or otherwise. That is, emulsions moved from such fixers to water or hca baths will experience osmotic swell. My experience with film and paper and the fact that developer and fixer and emulsions do coexist in mono-baths and P. Gainers own testimony leave me to doubt there is any problem with physical development. I use all photographic chemistry one-shot and very dilute. I don't worry about any of the above. Nor are there any bothering fumes or oder thanks to the chemistry's non-acid nature. Dan
|
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Master Mason Handbook | Doug Robbins | 35mm Photo Equipment | 0 | July 15th 04 03:33 PM |
| Developer shelf life | Rearwin185 | In The Darkroom | 1 | May 31st 04 04:25 PM |
Linear Mode
