The photographic plate has not only aided discoveries in the vast realms of interstellar space, but has also revealed to us things so exceedingly minute that no other method of observation could bring them within the range of our perceptions.
WRITTEN FOR THE MENTOR BY PAUL L. ANDERSON
ILLUSTRATION FOR THE MENTOR. VOL. 6, No. 12, SERIAL No. 160
COPYRIGHT, 1918, BY THE MENTOR ASSOCIATION, INC.
BY PAUL L. ANDERSON
PORTRAIT—By the Bromoil Process
PHOTOGRAPHY
A Bromoil Print
FOUR
In the bromoil process, the first step is to make a bromide enlargement. The negative from which a print is to be made is placed in an apparatus resembling the familiar stereopticon and an enlarged image is projected on a piece of bromide paper, or paper that has been coated with an emulsion similar to that used for plates. After the paper has been exposed to the image it is developed, fixed and washed, the result being a large positive print of the original small negative. Often this print is allowed to remain as it is, and it is then known as a bromide enlargement, or, simply, an enlargement; sometimes the worker converts it into a bromoil.