Quote Originally Posted by Ken Nadvornick View Post
Might these second two filters be intended for different materials? I'm really curious regarding your observed results.
Well, we need a cross-reference between Thomas' "edge tape color" based ID scheme, and the various gel colors, but as a clue, here are the official instructions from Thomas (I scanned the sheets that came with mine):

http://backglass.org/duncan/darkroom...ight_instr.pdf

Duncan