Re: archivalness of gum
On Sat, 22 Dec 2007, Christina Z. Anderson wrote:
P.S. I wanted to also add, Judy, that my stain test chapter is now organized into sections--stain tests WITH exposure and stain tests WITHOUT exposure (can I possibly be any more obsessive compulsive???!!). In chronological order, heheheheheh. 2 11pt. single spaced pages of different stain tests WITHOUT exposure, and one bitty paragraph devoted to you and a guy named Richards from 1905.The effect may be related to Mike Ware's theory, maybe 95 years later -- as I've quoted many times : that the bit of exposure makes the emulsion more viscous, hence more likely to clear (or words to -- roughly -- that effect).
He developed the bend test: "coat a strip of the paper with the sensitized pigment solution. After dry, bend it in a zigzag. Expose to light a minute or so and put in water. See that in the bends where no exposure occurred if after 10 mn the pigment has left the paper-if so, it is suitable."
Delicious....I think some of these folks didn't have enough to do (no TV, no internet, and womenfolk cleaning up after them). But it also seems to me they're overlooking the main factor controlling stain IN MY STUDIO: NYC Heat times Humidity.So he is still reading from the no exposure parts which is also funny!
Have you got the part where Demachy says "les etrangeres" ("foreigners," meaning primarily the Austrians/Germans do multiple coats but he (and Puyo, among the French) do only one coat?And, Judy, as an aside, I have a nice little chapter on the dreaded stain test, tracing its origins, who brought it from Germany to England and then to America. Word for word..culprit for culprit. I'm dedicating that chapter to you :) There was the distinct feel that the Germans were more scientific about gum and hence "modern" or "better". But we postmodernists know better than to be scientific about gum, heheheheheh.
But this is all too interesting -- do you know how much reality I've got waiting, piled up in my hair (to mix metaphors)?