[alt-photo] Re: Re-acidifying papers with sparkling water?

[Paul Viapiano]

Of course I agree...

Then let me ask this...we know that oxalic acid neutralizes enough for pt/pd 
printing. Does it not neutralize enough for cyano and van dyck...?

p


----- Original Message ----- 
From: "Ryuji Suzuki" <rs at silvergrain.org>
To: <alt-photo-process-list at lists.altphotolist.org>
Sent: Friday, April 23, 2010 2:53 PM
Subject: [alt-photo] Re: Re-acidifying papers with sparkling water?


> From: "Paul Viapiano" <viapiano at pacbell.net>
> Subject: [alt-photo] Re: Re-acidifying papers with sparkling water?
> Date: Fri, 23 Apr 2010 09:32:57 -0700
>
>> Chris...
>>
>> What about using an oxalic acid solution for pretreating paper
>> for cyanotype, much as pt/pd printers use.
>>
>> You could also try citric acid as well...all much less risky
>> than using HCl acid.
>
> Before coming up with a list of acids people can think of,
> here are I think important criteria:
>
> 1. the acid must be able to neutralize all calcium carbonate
>   in the paper
> 2. the residue does not interfere with the iron-based imaging
>   system
>
> Safety, accessibility, etc., are important factors but if
> these two criteria are not met, those factors are irrelevant.
>
> --
> Ryuji Suzuki
> "The purpose of art is not the momentary ejection of adrenaline,
> but rather the lifelong construction of a state of wonder and serenity." 
> (Glenn Gould)
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