His emulsion must be fairly thin (low gel %). It was not sitting on any heat for quite some time (1:15 of video time, plus at least one cut), and still poured and flowed very easily on what I think he said was chilled glass.
Those rods are made by a company in Webster NY which is a suburb of Rochester. Mark has a set for his courses. We don't use them for Silver Halide emulsions on paper because they are messy, wasteful and difficult to use on paper. They are excellent for film and plates and for non-Silver Halide systems.
1. The emulsion that Tod is seen coating does not contain the UltraStable sensitizer. The sensitizer is quite reactive to light when wet (even more so in the dry power state it comes in) and the normal lighting would be a low-level red safe light.
2. The coating solution was "casually" prepared for purposes of this demo and was probably a 6% solution as compared to the usual 10-12%.
3. The coating (or metering or Mayer) rod used is #200 and lays down a wet film thickness of 18 mil.
4. The highly transparent quinacridone magenta pigment (PR 122) darkens noticeably when the coating is dried.
I've posted on http://www.YouTube.com/UltraStableColor a 4-part video of Tod Gangler making a color carbon print. More of a "demo" than a "how-to", the most important feature of the video is its portrayal of how a master printer works with, and thinks of, his materials. Carbon is a simple process when an understanding of its basic principles is grasped. Following (often incorrect) processing steps by rote is the short road to failure.
Each part is 8-9 minutes long, and although severals steps are not included due to time restrictions, its a good presentation of the process (best to view them in the 1-2-3-4 order). More detailed information can be found in the UltraStable Process Instructions.