[alt-photo] Re: Chlorox Bleach Development of Gum

[C.Breukel at lumc.nl]

Hi Marek,

I'll try to upload it, it has been while I've done that on my allotted
web space of my provider, will let the list know when I have succeeded,

Best,

Cor

-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf
Of Marek Matusz
Sent: donderdag 14 januari 2010 16:53
To: alt photo
Subject: [alt-photo] Re: Chlorox Bleach Development of Gum


Cor, 

Could you put the print online for us to see?

I am happy to hear that more people try and experiment with gum
development. 

One of the tricks that might be related to the recent idea of just using
high pH solutions for gum development is the use of metabisufate soak.
The solution of metabisulfate is also basic. 

In addition to just a short soak for clearing dichromate stain, a
somewhat longer soak will soften the emulsion somewhat to the extent
that is nicely workable with bristle brushes. I have used this
extensively to work on and correct dried prints. 

I should try to see if metabisulfate can be used as succesfully as
chlorox for gum development. 

Marek
 
> Date: Thu, 14 Jan 2010 09:13:02 +0100
> From: C.Breukel at lumc.nl
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [alt-photo] Re: Chlorox Bleach Development of Gum
> 
> 
> A follow up,
> 
> The chlorox bleach development worked like a charm. It took quite some
> time and patience (I alternated: about 15 minutes in 2% house hold
> bleach and than 15 minutes in water for about 3 hours or so) the
almost
> opaque gum layer slowly and nicely opened up, faster in the bleach
bath
> (or less slow) and slower in the water.
> 
> It became that nice that I find a single gum layer sufficiently
detailed
> and dense (the first layer was a severely underexposed platinum image,
> only Zone I and II showed to give an indication).
> 
> Thanks for a great tool, Marek!
> 
> Best,
> 
> Cor
> 
> At 08:21 AM 01/13/2010, you wrote:
> >And another one, which Loris already kindly answered, but might be
> >interesting to draw attention to below method again anyway..
> >
> >
> >Cor
> >
> >
> >
> >.....................
> >
 		 	   		  
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