Walter, FAEW is an acronym for Fabriano Artistico Extra White. (There's also FATW -> Fabriano Artistico Traditional White...)
BTW, I've just noticed your statement: "...Should find a brown bottle and mix up a bigger batch of sensitizer to keep it consistent and make proportions easier to control. Does the dissolved dichromate solution last any reasonable length of time?..."
I hope somebody has already posted a PM to you that you shouldn't mix gum/pigment and dichromate beforehand; you have to add dichromate right before coating. If not, the solution will definitely go bad. Quicker in high temperature / humidity and light levels, slower in low temperature / humidity and light levels. If you absolutely need to mix and store the coating solution beforehand (I can't think of a single reason for doing that BTW...), keep it away from light (especially daylight or any other light which substantial amnt. of UV) and keep it cool (in the refrigerator). Even kept in optimum conditions, I don't recommend storing the premixed coating solution more than 1-2 days. Gum isn't like cyanotype or vandyke / argyrotype where you directly use the stock sensitizer solution, you have to compound/mix the solution for each print individually. (Or at least for each - short - printing session!)
