Re: re-clearing pt/pd
Paul, Have you tested your water's pH level? If it's basic you're going to make it very difficult to clear your prints. I do something similar to Matt: 5 minutes in 120F potassium oxalate, 5 minutes in citric acid, 5 minutes each in 2 HCA baths. My highlights have ZERO yellow to them. You can cover a portion of the coated area with aluminum foil during the exposure and after processing the covered area should be paper white or you're having clearing issues. -Jeremy- On Thu, Dec 18, 2008 at 9:54 AM, Paul Viapiano <viapiano@pacbell.net> wrote: > Matt... > > I use a water rinse after development and 3 baths of citric acid. Maybe I'll > try some HCA as well... > > In the image itself, what color should 90-95% white be? Wouldn't that slight > wisp of tone be yellow-ish? > > So far, Platine is the only paper I've used for Pd printing, but I have a > bunch of Fab EW to try yet. The Fab EW was great for argyrotypes, after > acidifying of course. Also, so far, I have only used Amm Citrate as a > developer in temps from 80-90 degrees F. > > Paul > > > > ----- Original Message ----- > From: Matthew Magruder > To: alt-photo-process-l@usask.ca > Sent: Wednesday, December 17, 2008 6:56 PM > Subject: Re: re-clearing pt/pd > ahh. thank goodness it was only a test strip. > The long answer (at least my experience thus far) > Some papers lighter papers (cranes 90# cover, platinotype, arches platine, > and japanese papers) these can sometimes be "re"cleared after theyve been > washed and have dried. > But when it comes to thicker papers (Rives BFK, Fabriano Artistico and such) > those things seem to retain that yellow stain no matter how long you try to > "re"clear them. In fact, I've tried it before with Fabriano Artistico and > during the "re"clearing the image actually started to bleach out in the Sod. > Sulfate and EDTA bath long before the yellow stain would go away. > Sometimes that residual Ferric Ox just clings on for dear life and won't let > up. > Side note, are you using only citric acid baths as clearing with platine? 2 > or 3 baths? > My main procedure is the first bath is Citric Acid, 2nd and 3rd are HCA > baths (Sodium sulfate and metabisulfate) > part of that train of thought being that the more alkaline HCA baths can > help to bring the acid level of the paper/print more nuetral before throwing > it in the wash. > Just brainstorming of course. > Matt > On Dec 17, 2008, at 7:41 PM, Paul Viapiano wrote: > > Twas only a test strip but thought I'd ask... > > I was using Platine with citric acid clearing baths... > > Paul > > > > > ----- Original Message ----- > From: Matthew Magruder > To: alt-photo-process-l@usask.ca > Sent: Wednesday, December 17, 2008 4:37 PM > Subject: Re: re-clearing pt/pd > Reprint the image Paul. > Likely be worth it in the long run. > matt > > > On Dec 17, 2008, at 4:05 PM, Paul Viapiano wrote: > > Hi all... > > Been quiet around here lately... > > Just wondering if you can re-clear a palladium print after it dries...in > case you see some yellow after drydown? > > Thanks! > > Paul > > >
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