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Everything I've always wanted to know about sodium sulfite but was afraid to ask...
Greetings all:
I recently picked up a Polaroid 545 and some film, along with the requisite sodium sulfite and other goodies, and I have some questions about the sodium sulfite, but cannot find the answers anywhere! First, is whatever I put in the tray a one-shot use, or can I use the same solution for multiple negatives? How do I know when it's depleted? If it's a one use situation, so be it. I do plan on shooting and then coming home to process, rather than develop in the field. Second, once used, what's the proper disposal method? I have friends who pour everything down the drain, and then those who recyle everything. Thanks in advance. Brian |
#2
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Everything I've always wanted to know about sodium sulfite butwas afraid to ask...
BVStaples spake thus:
Second, once used, what's the proper disposal method? I have friends who pour everything down the drain, and then those who recyle everything. Sorry I can't answer your other questions, but on this one, keep in mind that among other uses, sodium sulfite is used for preparing food (dried fruit, for example), so it's very safe to dispose of it down the drain. -- Any system of knowledge that is capable of listing films in order of use of the word "****" is incapable of writing a good summary and analysis of the Philippine-American War. And vice-versa. This is an inviolable rule. - Matthew White, referring to Wikipedia on his WikiWatch site (http://users.erols.com/mwhite28/wikiwoo.htm) |
#3
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Everything I've always wanted to know about sodium sulfite butwas afraid to ask...
BVStaples wrote:
Greetings all: I recently picked up a Polaroid 545 and some film, along with the requisite sodium sulfite and other goodies, and I have some questions about the sodium sulfite, but cannot find the answers anywhere! First, is whatever I put in the tray a one-shot use, or can I use the same solution for multiple negatives? How do I know when it's depleted? If it's a one use situation, so be it. I do plan on shooting and then coming home to process, rather than develop in the field. When you use it, scuzzy stuff comes off the negative, that usually settles to the bottom. But not all of it. Eventually, it may redeposit on the negatives. Just before that happens ;-) , replace it. I would not keep it over a day because the stuff oxidizes into sodium sulphate that is less useful. Second, once used, what's the proper disposal method? I have friends who pour everything down the drain, and then those who recyle everything. Dumping it down the drain increases the oxygen demand of the effluent, but home users probably do not dump enough that the sewage treatment plants would even notice. It is technically non toxic, but I strongly advise against drinking it. Causes asthma attacks in some people, and IIRC, you can turn blue if you drink enough of it. Recall that even table salt will kill you very soon if you consume too much of it. The dose makes the poison. Thanks in advance. Brian -- .~. Jean-David Beyer Registered Linux User 85642. /V\ PGP-Key: 9A2FC99A Registered Machine 241939. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 08:05:01 up 82 days, 19:34, 3 users, load average: 4.57, 4.24, 4.16 |
#4
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Everything I've always wanted to know about sodium sulfite but was afraid to ask...
In article .com,
BVStaples wrote: Greetings all: I recently picked up a Polaroid 545 and some film, along with the requisite sodium sulfite and other goodies, and I have some questions about the sodium sulfite, but cannot find the answers anywhere! Did you try here?: http://www.largeformatphotography.info/forum/ First, is whatever I put in the tray a one-shot use, or can I use the same solution for multiple negatives? How do I know when it's depleted? If it's a one use situation, so be it. I do plan on shooting and then coming home to process, rather than develop in the field. I'm trying to remember where, but I vaguely remember that I read that 2l of the stuff is good for up to 100 sheets of type 55. I got a 2.5l bottle and a filtered funnel to store my sodium sulfite solution and I've used it for about 20 sheets and, besides becoming increasingly purple in color, it seems to work fine. I got a Yankee developing tank with a broken top for cheap (that being free) that works well for clearing the negatives. They're very very easily scratched, so be careful when handling them. Also, rinse with at least room-temperature water, not cold, it'll get the last of the gel goo off easier. Here's an alternate view to processing and storing type 55 that looks interesting: http://www.cameraartist.com/words/20...oid_55_pn.html I don't know why perma wash would be any better than sodium sulfite. Otherwise, what he says about cotton gloves and careful handling is quite right. I might try the perma wash after my current batch of sodium sulfite is used up, as it might be easier to store. Second, once used, what's the proper disposal method? I have friends who pour everything down the drain, and then those who recyle everything. I botched my first solution of sodium sulfite (when they say dissolve in warm water and stir slowly, they mean it!) and just poured it down the drain. Drew -- Drew W. Saunders dru (at) stanford (dot) eee dee you |
#5
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Everything I've always wanted to know about sodium sulfite but was afraid to ask...
On May 10, 7:09 am, Jean-David Beyer wrote:
BVStaples wrote: Greetings all: I recently picked up a Polaroid 545 and some film, along with the requisite sodium sulfite and other goodies, and I have some questions about the sodium sulfite, but cannot find the answers anywhere! First, is whatever I put in the tray a one-shot use, or can I use the same solution for multiple negatives? How do I know when it's depleted? If it's a one use situation, so be it. I do plan on shooting and then coming home to process, rather than develop in the field. When you use it, scuzzy stuff comes off the negative, that usually settles to the bottom. But not all of it. Eventually, it may redeposit on the negatives. Just before that happens ;-) , replace it. I would not keep it over a day because the stuff oxidizes into sodium sulphate that is less useful. Second, once used, what's the proper disposal method? I have friends who pour everything down the drain, and then those who recyle everything. Dumping it down the drain increases the oxygen demand of the effluent, but home users probably do not dump enough that the sewage treatment plants would even notice. It is technically non toxic, but I strongly advise against drinking it. Causes asthma attacks in some people, and IIRC, you can turn blue if you drink enough of it. Recall that even table salt will kill you very soon if you consume too much of it. The dose makes the poison. Thanks in advance. Brian -- .~. Jean-David Beyer Registered Linux User 85642. /V\ PGP-Key: 9A2FC99A Registered Machine 241939. /( )\ Shrewsbury, New Jersey http://counter.li.org ^^-^^ 08:05:01 up 82 days, 19:34, 3 users, load average: 4.57, 4.24, 4.16 No. it is technically toxic because it turns the hemoglobin in your erythrocytes into methylhemoglobin which does not carry oxygen well. When a person who is blue (and still alive) turns up to the E.R., the routine way of treating them is to give them methylene blue, which paradoxically is also blue, but demethylates hemoglobin. You could neutralize your sodium sulfite with hydrogen peroxide solution, or rusty steel wool, or expose it to air in the sunlight for a few days. David |
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