Re: Clearing (Re: Fog test. Was: Re: Making)
Jeffrey D. Mathias (Jeffrey.D.Mathias@worldnet.att.net)
Sun, 02 Feb 1997 09:26:26 -0800
Eric J. Neilsen wrote:
...
(Does your clearing bath get cloudy? or just
> brown/yellow in color?)
>
> Try this test.
> Add a small amount of rinse from your coating devise , brush or rod, to
> some of your "tap" water. If it clouds ups, you should consider using
> distilled water for at least your first, and perhaps second clearing
> baths. You should notice that your prints clear much easier.
>
...
> Also try Kodak's Hypo Clearing Agent (Mostly EDTA) as a last step. Very
> useful to help your paper clear.
>
...
Eric,
Tried the test. Bath does not get cloudy, turns yellow stays clear.
However, I will note your suggestion just in case.
Also, I plan to try your hypo clearing agent on Arches Platine paper.
This paper seems to need a final bath in Sodium Sulfite or Potassium
meta-Bisulfite to get rid of all the yellow.
Also, Richard Sullivan wrote:
... the very very best clearing agents are, postassium cyanide, very
weak
> hydrofluoric acid and sodium fluoride. ... I have had prints sent to me variously stained
> and uncleared that I was able to salvage and clear up beautifully in one or
> more of these compounds ...
Richard,
I am interested in your technique to remove a stain from a dried but not
completely cleared print. In my years of traiding Pt/Pd prints, I have
acquired a couple of questionable clearing. (I will not name the
photographers because their work is great.) However, I would consider
additional clearing to prevent them from deteriating further. Of course
a big question is: is this technique safe for the print ? Anyway, you
mentioned three posibilities. Please send the suggested formulas for
working solutions and an outline of your proceedure. Thanx.
Jeff