Wet prints dry flat and quickly when placed between blotters. Blue print is an alternative term for cyanotype . Blue sensitive is sensitive to blue light only. All silver halides used in traditional black and white emulsions are sensitive to blue light, but early photographic materials had only this sensitivity. Blur is unsharp image areas, created or caused by subject or camera movement, or by selective or inaccurate focusing.
Boom is an adjustable metal arm, attached to a firm stand, on which lighting can be mounted.
Some booms are also made to support cameras. Borax is a mild alkali used in fine grain developing solutions to speed up the action of the solution. Border is the edge of a photographic print - either left white, or printed black. Boric acid is a compound used in certain fixers to prolong shier hardening life. Bounce light is a light that is directed away from the subject toward a reflective surface.