[alt-photo] Re: Gum...again!

[Christina Anderson]

Paul,
If you go to here:

http://christinazanderson.com/Text_page.cfm?pID=2076

and scroll down you will see a comparison with a gross overexposed border, before and then after cleared in potassium metabisulfite.  So if you are having troubles getting dull colors, buy some. 2 tsp. per liter, soak the print 2-5 minutes. Otherwise the simpler solution would be not to overexpose...or cut your dichromate down to either a 7.5% or 15%. Or develop longer for the brownish dichromate stain to disappear. If I develop too little I notice more of that dullness left behind.
Chris


Christina Z. Anderson
christinaZanderson.com

On May 14, 2010, at 8:17 PM, Keith Gerling wrote:

> I'm sure there must be an explanation for what you observe, and maybe
> somebody can offer it.  But I have to say that I have over-exposed on many
> occasion - sometimes grossly, and i have not observed a drastic change in
> color.  Subtle maybe, because of the tanning effects of the gum itself, but
> mostly the end result is exactly like the pre-exposed gum+pigment.
> 
> Please, oh please Gods Of Gum!  Do not inflict upon me another ill!  I've
> had so many...  But not this one.. Yet...
> 
> On Fri, May 14, 2010 at 6:33 PM, Paul Viapiano <viapiano at pacbell.net> wrote:
> 
>> Hi all...
>> 
>> I've been printing away here since my entry to gum one year ago, exploring
>> this and that and being accepting of the vagaries of the gum experience,
>> going with the flow, etc...and having a lot of fun among the
>> disappointments.
>> 
>> But today, while experimenting with different papers for making unwaxed
>> paper negatives (I've been using waxed negs for gum for the last few months
>> or so) I ran across something which I don't think I've seen mentioned;
>> either that or I am totally losing my mind. And that is how drastically
>> overexposure can totally change a color or certain colors.
>> 
>> I'm used to seeing dull colors after development, nothing like the brushed
>> out color intensity of just pigment mixed with the gum, and although I've
>> tested exposure many times with my wedges, I don't think it really hit me
>> until today that not only will an overexposed layer take longer to develop,
>> it drastically changes and dulls the original color.
>> 
>> I think I've been overexposing all along...
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