Hi guys, I do B&W work at home, for which dust isn't really a problem. A bit gets on the negs, I brush it off (sometimes requires a bit of a good wiping with isopropanol) and then it's all good. I got some slides back from the local pro lab recently though and they were filthy. I'm gonna tell them they need to clean their processor out, but is it possible that different films have a different affinity for dust? This stuff seemed to be embedded right in the emulsion and would not brush off. I've also noticed that fingerprints soak into E-6 in a nasty way, leaving colour-shifted patterns whereas with B&W negs I can just wipe the oils off the surface with some isopropanol. (I got cotton gloves for handling slides but somehow it still happens if I'm holding tightly onto a corner for a while, e.g. trying in vain to remove a pound of dust from a frame). Are C-41 films typically susceptible to this sort of damage or not?