Re: ferric oxalate
I'm not much competent on DOP Pt/Pd but if I'm not mistaking, that depends on the strength of your metal solution... Anyway, see this: http://home.att.net/~jeffrey.d.mathias/guidep/formulae_calculator_FO.htm and this: http://home.att.net/~jeffrey.d.mathias/guidep/formulae_calculator.htm The contents page of full text: http://home.att.net/~jeffrey.d.mathias/guide/contents.htm Read the small print on page 1. It says 25% FO (and accompanying metal solution) is about optimum... Regards, Loris. 10 Kasım 2008, Pazartesi, 11:13 pm tarihinde, Diana Bloomfield yazmış: > Oh, lord no. Not for a minute would I attempt to make anything from > scratch-- except maybe a pound cake. > No, I'm just trying to mix up the ferric oxalate powder with > distilled water and would like to know the amounts to use-- water to > powder, and can you ever heat the water too much? Just having a hard > time here, so wonder if I'm doing something wrong (as usual). > > Thanks, Neal. > > Diana > > > On Nov 10, 2008, at 4:06 PM, Neal Wilson wrote: > >> Diana >> You are trying to make Ferric Oxalate from scratch? I've always >> been told this was a difficult process because of the compound's >> instability. There are detailed instructions at http:// >> e.neilsen.home.att.net/FerricOxalate.html I've read again and >> again that this was something to buy rather make because of the >> time it takes and that the relative cost savings is neglible. >> >> Did I misunderstand your question? >> >> Neal >> >> >> >> >> >> >> EMAILING FOR THE GREATER GOOD >> Join me >> >> >> > Date: Mon, 10 Nov 2008 15:59:27 -0500 >> > From: dhbloomfield@bellsouth.net >> > Subject: ferric oxalate >> > To: alt-photo-process-l@usask.ca >> > >> > >> > I'm trying to mix up some ferric oxalate, from powder, for use in >> pt/ >> > pd printing. Can someone detail their formula for me, for mixing >> > this thoroughly? >> > Thanks. >> > >> > Diana > >
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