aside from being able to be viewed as a singular item
( like a tintype/ambrotype/alumintype/keriktype/schwabtype &C)
collodion negatives can be used to reproduce positives ...
it can be and peeled off the glass substrate and is actually a sheet of celluloid film,
before collodion was identified / re-purposed for a photography the only reproducible negatives came
from the talbotype / calotype ... and even after the "wet plate age" collodion was film's first step
into being a mechanically ( or human ) reproduced positive .. non-safety film, xray film, movie film.
it was only after the fire are the cleveland clinic that safety film was invented
collodion has a lot of other uses too.
it is used in the record industry to make blanks / lacquer plates ( what first pressings are made from );
it is used in the explosives trade to make "stuff" ( made from guncotton );
fingernail polish; and "new skin"
and it still has medical uses ... and is in things like compound w. and new skin (like a clear bandage)
the whole collodion bandage thing has reminded me about people
self combusting " it happens all the time" ... now it all makes perfect sense