Re: Full color gum printing

Hi Joe,
Thanks, it rings my bell.
Are you suggesting that if during exposures some yellow-green shows (in
abundance) to clear it before going to the following exposure?
Then you suggest "to wipe it off and wash" but once exposed is very
difficult, I use some hot water and not always everything comes off. If I
bleach I ruin everything.
What do you mean with that?
Thanks,
Giovanni
----- Original Message -----
From: "Joe Smigiel" <jsmigiel@kvcc.edu>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, July 05, 2004 1:12 PM
Subject: Re: Full color gum printing

> Giovanni,
>
> Have you tried clearing the print in a solution of potassium
> metabisulphite or similar clearing agent? I've found a slightly
> greenish cast results from the accumulated dichromate image (which I
> believe others on the list refer to as "dichromate stain") followed by a
> wash. You might also try a lightly printed magenta layer to neutralize
> the color cast and adjust the overall color balance. I suggest magenta
> since your description of the problem appears to center around a green
> imbalance and magenta is its complementary color. (With pigments, G =
> Y+B)
>
> If you are familiar with chromogenic printing and have a set of print
> viewing filters around, you might be able to better determine if the
> present color imbalance is more to the green, yellow, or blue, and then
> choose a more appropriate corrective pigment choice. It is difficult to
> suggest more without knowing how the color imbalance is appearing. For
> example, are the shadows too blue and the highlights too yellow with
> green midtones? Each of these tones present a different quandary and
> require a different solution.
>
> I certainly would not throw the print away since it is difficult to ruin
> a gum print by doing another lightly printed layer. If it doesn't look
> correct, you can just wipe it off in the wash and do another layer. The
> danger is overexposing the corrective layer so that it cannot be removed
> with a bit of physical manipulation in the wash.
>
> Joe
>
> >>> gdimaseu@yahoo.com 07/05/04 10:55 AM >>>
> I am trying to figure out what adjustments can be done to an almost
> finish
> full color gum print but unfortunately with either slightily too much
> yellow, green or blue on the image.
> If you have experienced the process you may have run that the pigment
> may
> had some problems or the expoure did not come out as planned and you
> ended
> up with this almost complete print but with a slightly different color.
> My thoughts are than instead of throwing it away and start all over
> again is
> worth to try to fix it.
> Any idea or experience you would like to share on this subject?
> Thanks,
> Giovanni
> gdimaseu@yahoo.com
>
>
Received on Mon Jul 5 14:11:38 2004