Definitions for "CONTACT PRINTING"
The strip of negative is placed in contact with the printing paper and held in that position in a printing frame when the print is made. When contact prints are made usually, the contact sheet is given an average exposure to match the exposure of the majority of the images.
Contact printing is when your image is produced by placing the negative directly onto the photographic material when exposing it to light, thus making an image. For example, you've run out a digital negative on a transparency. You place this on top of a coated cyanotype paper, then expose it to UV light. The final image will be the same size as the negative is. I.e. you don't use and enlarger, like you would when printing from 35mm negatives.
A method of recording details of a macroetched structure. See Sulfur Prints.