From: Darryl Baird (dbaird@umflint.edu)
Date: 08/15/03-10:18:57 PM Z
Hi Chris,
I think you should forget all this nonsense and throw yourself on the
mercy of your graduate faculty, they'll take pity on you as long as you
promise to never research another alt-process! (Joking!! I'm writing
down everything)
How's the South look after Montana/Minnesota, kinda weird, huh? Found
any kudzu growing on or about your domicile yet?
Glad to hear you've survived the trek. Might I recommend Patricia
Cornwell (forensic mysteries, wife's favorite) or Janet Evanovich
(sister's fav... lighthearted).
Darryl
Christina Z. Anderson wrote:
>Good evening, list!
>
> I have been in the throes of moving and setting up internet services in
>a new place and trying to get all connected, and struggling with a laptop
>with a too small keyboard. Microsoft wireless keyboard came to the
>rescue--ergonomic, no less. However, I continued through all this to
>ruminate on gum printing (I should really give this up and start reading
>romance novels).
>
> This is in response to Dave Rose's interest, about a month ago, in
>hearing my thoughts/research on gum staining. As I was driving cross
>country, I outlined the issue of gum staining in my mind, including all I
>have read and experienced, and thought I could share this outline with the
>list in a way that seems logical to me. I'll try to reproduce the outline,
>below (but it probably will get all off kilter when it goes thru the
>internet) and would love comments/addtions, as I usually miss the obvious
>(duh).
>
> Also, Judy, I can't believe I overlooked in my notes this bit of
>research: in the BJP of April 1908, it was a Mr. C. Wille who demoed gum and
>did the pigment/gum titration stain test, using 1-7 pts gum, so unless
>Anderson's stain test is before this date, Mr. C. Wille is the culprit
>behind the fetishistic stain test, that b*&()!!!.
>
> In my mind, the problem is, in the large picture, degraded highlights
>or whites of the paper. So it looks to me to be something like this:
>
>I. Degraded Highlights
> A. Insolubilization of the gum/pigment on the paper
> 1. Insolubilization due to light exposure
> a. Fogging or accidental non-image exposure
> b. Overexposure
> 2. Insolubilization due to other than light exposure
> a. Acidity of gum solution--either sour or by adding acids
> b. Dark reaction
> c. Continuing action
> d. Heat, excessive
> e. Certain pigments which are purported to cause
>non-exposure insolubilization (mentioned a number of times throughout
>history, but no mention of which ones specifically--perhaps chromiums)
> B. Pigment stain
> 1. Insufficient sizing
> 2. Improper proportion of pigment to gum, especially significant
>when using some colors that are highly saturated, finely ground, or
>generally considered "stainers"
> 3. Too much liquid so that the gum viscosity is lessened enough to
>allow the pigment to settle into the paper fibers
>Chris
>
>
>
>
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