RE: Glutaraldehyde again

I can't print in direct sun without getting wildly overexposed prints -
we have the "ozone hole" here and it affects printing. I've switched to
mercury vapour as a) I got a lamp cheap and b)being at 45 deg South we
have very short days in the winter & lousy weather!
Maybe it's just that I had to use saturated amm.di. to print at all in
diffuse sunlight?

I used potassium metabisulphate to clear. The difference wasn't
"dramatic" , more subtle but important.

Yes, certainly your prints are unexceptionable as far as colour goes.
I'm still having trouble getting density, as you'll see if you go to my
site, but am beginning to get a handle on the whole thing (I hope). I've
found that having to produce work for my degree slowed the whole thing
down a lot - hopefully now I'm doing an advanced degree I'll get a bit
more freedom. We study "by research" here so there aren't any deadlines
or handins except for the dissertation and final exhibition.

Cheers
Kate

Kate Mahoney Photography

-----Original Message-----
From: Katharine Thayer [mailto:kthayer@pacifier.com]
Sent: Sunday, 13 June 2004 4:16 a.m.
To: alt-photo-process-l@sask.usask.ca
Subject: Re: Glutaraldehyde again

Kate Mahoney wrote:
>
> Quoting Katherine:
> I think my lack of dichromate stain is probably related to the type of
> light I use more than anything else. In fact I'm beginning to think
>
> Do you really think it's your light? I used to use sunlight, found the
> stain less than with the mercury vapour lamp I'm using now - but I may
> have it too close to the work.

Well, I don't know what else to "blame" it on but the light. I don't
know about a mercury vapor light, how that compares. But if I remember
right, Judy doesn't get dichromate stain either and she uses a different
light than I do, so who knows.

It's interesting though that you say that you got less stain with
sunlight; I'm not sure what to think about that. Do you mean direct sun?
I printed in direct sun once, and I did get dichromate stain that time.

> Could it be your washing water

I doubt it, as I've lived in three different towns while I've been
printing gum, with different water sources, so unless Northwest water
is more wonderful than other water somehow (which I doubt, actually) I
don't think it's the water.

or method??????

Well, my method is pretty straightforward and unexceptional, so......

I'm curious - I always get
> a little stain and I hadn't realised how pervasive it was when I was
in
> the early experimental stage - until I finally cleared some prints
> properly. Then I was amazed!!!

As I've mentioned, clearing with the usual agents (sodium bisulfite or
potassium metabisulfite) doesn't change my prints, and I think the
reproductions on the website show fairly well that the colors are clear
and bright. The light is the only thing that makes sense to me, to
explain it.
Katharine

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