Entertainment / Photography Glossary

Air Brushing: Method of retouching b&w or color photographs where dye is sprayed, under pressure, on to selected areas of the negative or print.

Air-To-Air Photography: Photography of aircraft in flight from another aircraft.

Albert Effect: Effect that creates a reversed image. An exposed frame of film, treated with dilute chromic acid is exposed to light. Development then gives a positive image by darkening the film grains tha . . . View Full Definition

Albumen Paper: Printing paper invented by blanquart-evrard in the mid-19th century where egg whites were used to coat the paper base prior to sensitization. The albumen added to the brightness of the white . . . View Full Definition

Alcohol Thermometer: Instrument used for measuring temperature. It is an inexpensive and less accurate version of the mercury thermometer.

Alkalinity: Denotes the degree of alkali in a solution, measured in ph values. All values above ph 7 are alkaline.

Allegory: Work of art that treats one subject in the guise of another. An allegoric photograph usually illustrates a subject that embodies a moral 'inner meaning'.

Alum: Chemical used in acid hardening fixing baths.

Aluminum Compounds: Groups of chemicals often used as hardeners in fixing baths.

Ambient Light: The available light surrounding a subject. Light already existing in an indoor or outdoor setting that is not caused by any illumination supplied by the photographer.

Ambrotype: Mid-19th century photographic process introduced in 1851-52 by frederick scott archer and peter fry. It used weak collodion negatives which were bleached and backed by a black background whi . . . View Full Definition

Amidol: Soluble reducing agent which works at low ph values.

Ammonium Chloride: Chemical used in toners and bleachers.

Ammonium Persulfate: Chemical used in super-proportional reducers.

Ammonium Sulfide: Pungent but essential chemical in sulfide or sepia toning.

Ammonium Thiosulfate: Highly active fixing agent used in rapid fixing solutions which works by converting unused silver halides to soluble complexes.

Amphitype: Mid-19th century process based on an underexposed albumen-on-glass negative. This was viewed by reflected light against a black background to give a positive image similar to a ambrotype.

Anaglyph: Result of forming stereoscopic pairs from two positives each dyed a different color, usually green or red.

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