Re: Oxalic Acid Presoak for some pt/pd papers?
- To: alt-photo-process-l@usask.ca
- Subject: Re: Oxalic Acid Presoak for some pt/pd papers?
- From: Loris Medici <mail@loris.medici.name>
- Date: Fri, 03 Apr 2009 08:52:10 +0300 (EEST)
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Sam, FWIW, I use an even stronger acid (in a stronger concentration, 5%
hydrochloric acid) for 2 minutes in order to neutralize new stock Fabriano
Artistico (both Trad. White and Extra White), and it definitely doesn't
turn into blotting paper. Strange, because if I'm not mistaking, the pH of
some sensitizers (notably pt/pd) are pretty acidic. Wouldn't that rule out
the possibility of printing - with those particular sentizers - on most
papers altogether?
Regards,
Loris.
3 Nisan 2009, Cuma, 8:30 am tarihinde, Paul Viapiano yazmış:
> Hi Sam...
>
> No, it never happened to me...(knocks on wood...)
>
> I'm using 1% solutions in room temp water for 3 minutes.
>
> Paul
>
>
>
> ----- Original Message -----
> From: "sam wang" <stwang@clemson.edu>
> To: <alt-photo-process-l@usask.ca>
> Sent: Thursday, April 02, 2009 10:26 PM
> Subject: Re: Oxalic Acid Presoak for some pt/pd papers?
>
>
>> Paul,
>>
>> Have you or anyone else encountered the acid destroying the internal
>> sizing? It occurred to me a number of times, mostly on old stocks.
>>
>> Good way to make expensive but absorbent paper towels.
>>
>> Sam