how to
When I was growing up, my dad was working with black and white photography, taking the photographs and then developing them in the basement. The first time I had black and white film developed using a locally owned and managed photograph print shop, the prints were like the ones that dad used to make. Lately, I know only the location of color photograph processing and printing and I rarely make prints of my photographs.
Here, I tried to remember everything I learned or heard about filtering the lense for black and white film and see if this works doing digitally the same thing with GIMP.
With GIMP there are several methods to reduce the colors of a digital image into shades of white, gray and black.
The information I write here is often laced with self doubt, thinly disguised insults and an occasional flirt with people I have either met or imagined.
Better documentation about all of this can be found at docs.gimp.org.