Yes, beyond wet collodion there is moist preserved collodion, dry preserved collodion, unwashed collodion emulsion and washed collodion emulsion.

The collodion emulsions are really interesting because they seem like they shouldn't work, given that they are in a binder that doesn't absorb water so easily when dry. Collodion chloride emulsions for printing out paper are the easiest printng process invented. Unlike gelatin emulsions, a beginner can make the emulsion and coat a perfect sheet of paper that looks like factory made on the very first try. And...the final product is more archival than any silver gelatin product. The way we identify collodion pop prints in conservation is that they are the ones that don't fade. ;-)

Washed emulsions like those described in Klein's book are also amazing...but require more money to make. The mixed emulsion is poured though water and the "noodles" collected, dried and then mixed with more alcohol and ether. Those are the ones that were dye sensitized. The earliest dye sensitized plates used chlorphyl as the dye and were simply silver bromide wet plates...which were then washed individually. Yes, you can make dry plate tintypes with a washed silver bromide collodion emulsion.... but wet plate is faster and cheaper.

We have a collodion chloride emulsion workshop in November for anyone who is interested.

Or contact me with questions...Mark