Re: Seeking Information on 2 problems with Gum process
The ammonia turns the cyanotype lavender, correct? Does this interfere with your color balance?
And have you ever returned the gum print to an acid state and seen it revert back to blue again or no? In other words, I wonder if it would change over time if returning to a more neutral or acid condition.
One other question--does the ammonia eat away at your gum layer?
----- Original Message ----- From: "Keith Gerling" <firstname.lastname@example.org>
Sent: Wednesday, April 30, 2008 7:29 AM
Subject: Re: Seeking Information on 2 problems with Gum process
As my well-water is somewhat alkaline, the cyanotype layer bleaches out slightly during the subsequent gum stages. My approach is to overprint the cyano layer to the point where it is much too dark, and then to bleach it back to where I want it when the gum is finished. I use dilute ammonia. On Wed, Apr 30, 2008 at 5:50 AM, cadunn <email@example.com> wrote:Henry wrote: