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

[Marek Matusz]

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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