darkroom equipment 
Material required to process film and to print photographs in a darkened room.
Frame used to hold paper flat under an enlarger; its movable edges make allowance for white margins on the proof.
Instrument that causes the image projected on the baseboard to be magnified and make it easier to focus.
Device that measures the exposure time of the photographic paper on the baseboard of an enlarger.
Device with two opaque plates that holds the negative flat between the light source and the lens of the enlarger.
Visible still image resulting from processing an exposed film; bright areas on the original subject appear dark on the negative.
Opening that frames the image to be enlarged and stops parasitic light from reaching the baseboard.