Re: Mixing ferric oxalate
Thanks to everyone who responded. I woke this morning to find all is well, my ferric is in solution! The 50ml was a typo, I used 100ml of water. Best wishes John. www.johnbrewerphotography.com Life shrinks or expands in proportion to one's courage. Anaīs Nin. ----- Original Message ----- From: "Loris Medici" <mail@loris.medici.name> To: <alt-photo-process-l@usask.ca> Sent: Sunday, September 10, 2006 10:06 AM Subject: RE: Mixing ferric oxalate FWIW, I mix my ferric oxalate (from B&S) like Kerik (no extra oxalic acid or EDTA), start to mix it in the evening, I stir well, put the solution into the bottle, shake the bottle for 1 - 2 minutes every half hour (this continues until I go to sleep; around 2 - 3 hours). When I control the bottle in the morning, everyting is in solution with no precipitate / particles... Regards, Loris. -----Original Message----- From: Kerik [mailto:kerik@kerik.com] Sent: 10 Eylül 2006 Pazar 09:43 To: alt-photo-process-L@usask.ca Subject: RE: Mixing ferric oxalate John, As Clay says, that's the amount to make 100 ml. I've also had difficulty with recent batches taking one or more days to fully dissolve. I just made a batch this week and left out the oxalic acid and edta until after mixing the ferric and water for an hour or so. This seemed to greatly speed up the dissolution process. It was completely dissolved in one evening. It also seems to help to stir/shake for a minute or 2, then let it sit for a while, rather than constant agitation Kerik www.kerik.com -----Original Message----- From: John Brewer [mailto:john@johnbrewerphotography.com] Sent: Saturday, September 09, 2006 12:06 PM To: alt-photo-process-L@usask.ca Subject: Mixing ferric oxalate Dear list I'm mixing ferric oxalate solution from powder and it just isn't going into solution. I used 27g ferric oxalate with 4.8g oxalic acid and 2g EDTA (Na4). I used hot distilled water to 50ml. I've been stirring for 3/4 hour and I still have a yellow green opaque liquid and my hand is about to fall off. Is it normal to take so long? Can I reheat a little? Any tips/ideas? Thanks John. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.12.2/442 - Release Date: 08/09/2006
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