Simple! It's the high caliber of work being produced by my former students! While I have taught many the bromoil process, I have learned from each and every student that I have worked with.
What camera format do you use for the negatives of your bromoil prints?
I have the camera collectors' disease and own far too many cameras! Bromoil is a process in which the negative can be enlarged in the wet darkroom onto photographic paper. I use 35 mm rangefinder Leicas, Canons, a variety of medium format Zeiss Super Ikonta folders and my favorites: vintage Rollei 120 twin lens reflexes.