Re: Eliminating CaCO3 in buffer in "achival" watercolor papers
What about glycolic acid? It is pretty efficient at removing limescale from the glass walls of my shower. It is apparently closely related to acetic acid but it doesn't stink (I wonder if it would make a good stop bath for silver gelatine photography?). Don Sweet ----- Original Message ----- From: "Loris Medici" <mail@loris.medici.name> To: <alt-photo-process-l@usask.ca> Sent: Thursday, August 14, 2008 1:48 AM Subject: Re: Eliminating CaCO3 in buffer in "achival" watercolor papers > Thanks David, > > I googled and found it to be "Por-Çöz". According various sources it's > diluted (albeit a quite strong concentration ~ 25%) Nitric Acid... Pay > attention while using it! :) Never saw it, I guess it's more common in > Southern parts of Turkey. (We use Mr Muscle... hehehe) I will still try > first with Acetic Acid... > > Regards, > Loris. > > > 13 Ağustos 2008, Çarşamba, 4:19 pm tarihinde, davidhatton@totalise.co.uk > yazmış: > > > > > > Hi Loris, > > I'm sorry about the spelling. It is a common lime solvent in these > > parts. Some kind of acid which can be used to clean away limescale in > > kettles etc. Get it from migros etc..It's a liquid and it dilutes > > easily and quickly. > > David > > > > On Aug 13 2008, Loris Medici wrote: > > > > Hi David, what is Porcges (sp)? > > > > Regards, > > Loris. > > > > > > 12 Aðustos 2008, Salý, 7:45 pm tarihinde, > > davidhatton@totalise.co.uk yazmýþ: > > > > > > > > > Hi Loris, > > > What about a mild solution of Porcges (sp) and a rinse in distilled > > water > > > afterward > > > David > > > > > > On Aug 12 2008, Loris Medici wrote: > > > > > > Thanks Diana, > > > > > > I also thought about citric acid but the product is insoluble Calcium > > > Citrate (a food additive), thus, it remains in the paper. I'd > > prefer > > > something that totally leaves the paper. Calcium citrate may interfere > > > with the process I intend to use - maybe that's why you didn't > > > get perfect > > > results... > > > > > > Thanks again, > > > Loris. > > > > > > > > >
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