RE: Potassium Oxalate recipe
Bob, I too am a potassium oxalate user. I used ammonium citrate for a while, and got some good results. But one day someone (I think it might have been Mark Nelson) suggested that I try the oxalate, and I haven't used anything else since then. Ammonium citrate is nice, but in my opinion oxalate is much nicer. It boils down to personal preference. Try it out, and if you like it make the switch. Camden Hardy camden[at]hardyphotography[dot]net http://www.hardyphotography.net On Fri, September 22, 2006 9:11 am, BOB KISS wrote: > 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. >> > >> > >> > >> >> >> >> > > > > >
|