The bromoil process was based on the oil print, whose origins
go back to the mid-nineteenth century. A drawback of oil prints was
that the gelatin used was too slow to permit an enlarger to be used, so
that negatives had to be the same dimensions as the positives. After
G.E.H. Rawlins published a 1904 article on the oil print process, E.J.
Wall in 1907 described theoretically how it should be possible to use a
smaller negative in an enlarger to produce a silver bromide positive,
which should then be bleached and hardened, to be inked afterwards as
in the oil process. C Welborne Piper then executed this theory in
practice, and so the bromoil process was born. (But this is a test) |