Kallitype is an obsolete printing process, resembling the platinum process. The image is formed in metallic silver rather than expensive platinum. Kerr cell is a high speed shutter without moving parts, using two crossed polarizing filters at either end of a cylinder filled with nitrobenzine. Keyed emulsion sensitivity is a term used to describe the color response of color printing papers which have peak sensitivities to the three dye colors present in the same manufacturers color negatives.
Key light is a studio light used to control the tonal level of the main area of the subject.
Kilowatt is a unit of 1000 watts. Used to measure the power of an electrical light source. Kinetic is concerned with movement and motion. Knifing is a method of removing marks and other blemishes from the surface of a print by gentle scraping with the tip of a sharp knife. Kostinsky effect is a development effect in which dense image points are inclined to move apart, relative to each other, and light image points to move together, relative to each other.