RE: Potassium Oxalate recipe
DEAR ERIC, Yes, that is what I use, Sodium citrate, because the local chem. supplier brings it in for the food industry. I also have a 5 kg bucket of citric acid and LOTZA sodium carbonate so, if I feel experimental, I can make up my own. I have 500g of Potassium Oxalate and will try it to see if the difference in print quality motivates me to use it at times instead of sodium citrate. I read reports of warmer color, etc. Do you suggest that I give it try? Which do your prefer, citrate or oxalate dev for pt/pd? CHEERS! BOB Please check my website: http://www.bobkiss.com/ "Live as if you are going to die tomorrow. Learn as if you are going to live forever". Mahatma Gandhi -----Original Message----- From: Eric Neilsen [mailto:ejnphoto@sbcglobal.net] Sent: Friday, September 22, 2006 10:13 AM To: alt-photo-process-l@usask.ca Subject: RE: Potassium Oxalate recipe Bob, I tried it some time back thinking that I had Sodium Carbonate in the chemistry closet. It has a much lessened ability to hold the result in solution than Potassium Oxalate. I tried to make it with the same ratio as Potassium Carbonate and Oxalic acid. I ended up making many more liters than I had intended. I used it a few times and can't say that I saw anything remarkable about it. I don't have any notes in front of me as to faster, slower, etc, but I'd expect it top be a little slower and possibly a bit grainer. I don't recall running test over various mixture; DOP, and POP permutations. I did try it a few times with Chrysotypes as well. It does bubble just like Potassium Carbonate does. I can run a quick test today as it still sits in my darkroom in a neat bucket. : ) I think that I'd go with Loris though and just make Sodium Citrate. Citric Acid is heavily used in food industry so it should be available quite easily. Eric > -----Original Message----- > From: BOB KISS [mailto:bobkiss@caribsurf.com] > Sent: Friday, September 22, 2006 8:46 AM > To: alt-photo-process-l@usask.ca > Subject: RE: Potassium Oxalate recipe > > OOOPS! I sent this question before reading all my e-mails. It was > already > asked. Sorry, but still hoping for an answer. > *****I am interested in the possibility of making Sodium Oxalate for PT/PD > printing. > CHEERS! > BOB > > Please check my website: http://www.bobkiss.com/ > > "Live as if you are going to die tomorrow. Learn as if you are going to > live forever". Mahatma Gandhi > > -----Original Message----- > From: BOB KISS [mailto:bobkiss@caribsurf.com] > Sent: Friday, September 22, 2006 9:05 AM > To: alt-photo-process-l@usask.ca > Subject: RE: Potassium Oxalate recipe > > DEAR ERIC, > Has anyone tried Sodium Oxalate as a developer? It is SO much > easier for > me to find Sodium Carbonate and Oxalic acid here in Barbados. Would it > work? If so what "recipe" would you recommend. > CHEERS! > BOB > > Please check my website: http://www.bobkiss.com/ > > "Live as if you are going to die tomorrow. Learn as if you are going to > live forever". Mahatma Gandhi > > -----Original Message----- > From: Eric Neilsen [mailto:ejnphoto@sbcglobal.net] > Sent: Thursday, September 21, 2006 7:26 PM > To: alt-photo-process-l@usask.ca > Subject: RE: Potassium Oxalate recipe > > John, 2 lbs of Pot Carb with 1.75 lbs to make 1 gallon of water. 1 lbs = > 457 > g and 1 gallon = 3.8 l ( top of my head but close enough as it is just POT > OX). > > Mix you Pot Card into cool distilled water; about 1/2 your total volume. > SLOWLY add your Ox Acid as it WILL BUBBLE!!!!. Add to completion and top > off with water to make final volume. > > > Eric > > > > -----Original Message----- > > From: John Brewer [mailto:john@johnbrewerphotography.com] > > Sent: Thursday, September 21, 2006 6:23 PM > > To: Alt list > > Subject: Potassium Oxalate recipe > > > > Hi list > > > > Does anyone have a recipe for potassium oxalate (as a Pt/Pd dev) using > > potassium carbonate and oxalic acid in metric units. > > > > Thanks > > > > John > > > > www.johnbrewerphotography.com > > > > Life shrinks or expands in proportion to one's courage. Anaïs Nin. > > > > > > > > > >
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