American Photo Volume 34 - Color Department - Joseph Friedman
Here are all the pages that pertain to dye-imbibition printing from volume 34 of American Photography, "Color Department", written by J.S. Friedman, c.a. mid 40's.
He covers dichromated gelatin matrices (what I'm trying to do), dichromate-bleach matrices and tanning developer matrices; both planographic (Pinatype) and relief style (wash-off) and a whole helluva lot more.
There is also a large section on selecting commonly available dyes, how to purify them, use them, etc.
All told, it's an excellent resource and I hope some will find it useful.
p.s. If anyone is interested I can send them a word file with it all nicely formatted in one document. Just shoot me a PM.
Here are pages 285-288
Gelatin Matrix with Extinction Dye
Here's a look at the still slightly wet matrix on photoformulary subbed melenex[sic]. Once dry it became significantly thinner (if you can even tell).
Tartrazine has been the standard "extinction dye" for color-blind matrix materials since the beginning, with Ives in 1914. We all likely consume some of this coal tar distillate every day in the form of yellow 5 of FD&C 5.
This coating is 5% per volume of classic McCormicks food coloring.