This is the fixing solution I use for both Vandyke and Kallitype.
Concentrate Stock Solution for Fixing of Kallitypes and Vandykes
Water, at 80ºF - 750 ml
sodium thisulfate - 200g
sodium carbonate - 40g
sodium sulfite - 8g
Water to 1000 ml
To mix a working solution, dilute 1 Part of Stock Solution + 3 Parts of water. I fix with two solutions, each for two minutes. The last is always fresh.
I have never actually tested the pH but am fairly certain it would be fairly alkaline.
My belief is that by the time a print makes it to the fixer the iron compounds should have already been removed.
Sandy
At 8:22 AM -0400 9/29/06, Ryuji Suzuki wrote:
But bleaching may be greater at lower pH as well...
Come to think of it, someone could make a neutral/weakly alkaline fixer
that contains something that facilitates removal of iron compounds...
On Fri, 29 Sep 2006 15:17:30 +0300, "Loris Medici"
<mail@loris.medici.name> said:
> Is that a problem? I see acidic PH as plus because it will not promote
> formation of iron hydroxides...
>
> Regards,
> Loris.
>
> -----Original Message-----
> From: Ryuji Suzuki [mailto:rs@silvergrain.org]
> Sent: 29 Eylül 2006 Cuma 15:03
> To: alt-photo-process-l@usask.ca
> Subject: RE: fixing van dyke
>
>
> One obvious concern is that Ilford Rapid wash is probably pH of about 5.
>
> ...
>