RE: making PO developer
Paul, There are also other possible explanations for what you have. Oxalic Acid can hold quite a bit of water, and if your supply was full of it, your weight might be off a little. It might also be excessive oxalic acid. That could be a GOOD thing as your developer will go toward the basic side from paper components. The excessive amount of oxalic acid will keep that from happening. A clue may have been seen when you added it to the solution. Did the effervescing slow down and stop? Or did it keep going as you added oxalic acid? If it was very slow or stopped, I expect to see that it is excessive oxalic acid. You may certainly filter it, and then add some new fresh oxalic to the solution; a small amount. Eric Eric Neilsen Photography 4101 Commerce Street, Suite 9 Dallas, TX 75226 214-827-8301 www.ericneilsenphotography.com SKYPE ejprinter -----Original Message----- From: Paul Viapiano [mailto:viapiano@pacbell.net] Sent: Friday, May 29, 2009 1:53 AM To: alt-photo-process-l@usask.ca Subject: Re: making PO developer Alberto... Yes, this is the first time I've made it. My water's ph is neutral, a 7. I'll just filter it and try a print... Paul ----- Original Message ----- From: "Alberto Novo" <alt.list@albertonovo.it> To: <alt-photo-process-l@usask.ca> Sent: Thursday, May 28, 2009 11:45 PM Subject: Re: making PO developer > Paul, > is this the first time that you prepared it? > Is your tap water particularly hard? If so, your precipitate is calcium > oxalate. Perhaps not harmful, but I would prefer to filter or decant it. > Alberto >> Hi all... Last week, I made my potassium oxalate developer. I haven't >> used it yet, but notice that there is a decent amount of precipitate in >> the bottom of the bottle. Not matter how much I shake it up, the next day >> it's still there. Should I just filter this out? ...or be worried about >> anything else? Thanks... Paul >
|