Re: tonal inversion and pigment loads

Tom,

I mean the interface area of pigments and paper where the water act as a
glue at this level (molecules) even under water.

Just a stupid idea again you can try the next time you print a step tablet,
place a piece of material that is certain to let no light through, metal
maybe to block everything say from step 11 and above.

Regards
Yves

----- Original Message -----
From: "Tom Sobota" <tsobota@teleline.es>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Friday, January 27, 2006 8:28 PM
Subject: Re: tonal inversion and pigment loads

> Hello, Yves,
>
> Yes, it is an idea. Not sure about this, because when the paper is
> developing in water, face down,
> there is not a surface between the gum emulsion and water. Once
> developed and out
> of the water there is, of course, but by then the inversion effect is
> already well formed and visible.
>
> But you can test your idea rather easily, I think. Make an image that
> presents inversion, and once
> developed, put it for a moment in a bath of some tensoactive agent, in
> order to destroy surface
> tension. Any photographic humectant should do, or even a kitchen
> detergent or soap.
>
> If your idea is right, you should observe some clearing of the
> inversion, stain, or whatever. If you
> do it, please tell us of your results. You could even try to develop in
> water with a little detergent,
> to see if there's any difference.
>
> Tom Sobota
> Madrid, Spain
>
> Yves Gauvreau wrote:
> > Hi Tom,
> >
> > I'm not sure this is in this line of thought but surface tension (the
> > phenomenon that allow bugs to walk on water amoung others) I think it's
> > called is a pretty strong force and gravity is certainly no match for it
in
> > the case of micrograms particules of pigments.
> >
> > Regards
> > Yves
> >
> >
Received on Fri Jan 27 21:52:56 2006