Film and Paper:
Emulsion: Layer of photosensitive substance coated on the base material.
Colour coupler: A substance that will show up colour on reacting with developer.
Dye: The colour formation substance in the emulsion.
Base: The carrier of the photosensitive material.
Latent image: An invisible image formed by light in the emulsion after exposure.
Reciprocity failure: A region on the characteristic pattern of the photosensitive material; at which it fails to produce a response proportionally.
Fog: Unwanted colours, which can make image, look misty
Developer: A chemical process to bring out an image.
Bleach: A chemical process to remove excessive silver caused by the developer.
Fix: A chemical process to dissolve silver halide crystal left over by developing.
Wash: A process to remove chemical left in the emulsion.
Stabilize: A chemical process to prevent bacteria growth, and colour fade out on the media.
Starter: A pre-seasoning chemistry applied to newly mixed chemistry.
Developing Agent: A chemical, which perform the reduction of silver and bring out colour as well if it is a colour: developing agent.
Anti-oxidant: A chemical use for preventing another chemical from turning bad through oxidation.
Anti-fog: A chemical, which can reduce the misty looking on image, caused by fog.
Water softener: A chemical, which can reduce the hardness of water caused by mineral salt.
Alkaline: A chemical, which controls the PH of developer within its operating range.
Acid: A chemical, which controls the PH of bleach, fix within its operating range.
Replenisher: A chemistry use to recover the lost of working solution through use.
Working solution: A chemistry that actually performs the processing.
Season: Aging of chemistry through use.
PH: A mean of measuring the alkaline or acidic property of solution.
Reduction: A chemical reaction, which can transform the silver halide into metallic silver.
Oxidation in developer: Developing agent attacked by oxygen, making it turns bad.
Oxidation in bleach: A chemical reaction, which can reverse the metal silver back into silver halide.
Tar: A black waste product generated by carry over of developer into bleach, which can stain picture.
Working tank: The chemical tank where actual processing occurs.
Replenishment tank: Container where chemicals are stored before it will be pumped into the working tank to refill the consumption or losses during processing.
Roller transport: A kind of processing machine design, which is utilizing lots of rollers to transport the material.
Roller transport with track: A kind of processing machine design, which uses both rollers and tracks to transport the material. This kind of design can reduce numbers of rollers.
Dip and Dunk: A kind of processing machine design, which dips the photo material into the working tank.
Printer: The machine where paper is exposed.
Rack: The roller mechanism where paper transport through.
Squeegee: A cleaning device in the form of roller or blade use to remove excessive chemistry to prevent carry over.
Stocker: A storage chamber, which holds the exposed paper, waiting for a batch processing
Cutter: A device used for cutting photo from a long strip.
Sorter: A device used to sort different order to photo.
Cut off filter: Light filters, which throw in during exposure period to stop a primary colour light passes through.
Dichroic filter: A kind of filter system to adjust the quality of light.
Ring around: A kind of printer calibration method by printing multiple prints of different colour settings, and selecting the best one. The procedure will be repeated until the colour is obtained.
Neutral Density: Does not has any colour contents. It can only affect the density.
Gray card: Cardboard, which has 18% light reflection gray colour.
Control negative: A negative made with specific type of film for calibrating printer.
Bull's eye: Nickname of control negative.
Density: The darkness of colour.
Colour Failure: The unfaithful reproduction of colour.
Negative Colours: The three primary colours when evenly mixed produce black colour. They are yellow, magenta and cyan.
Positive Colours: The three primary colours when evenly mixed can produce white colour. They are blue, green, and red.
Opposite colour: The colour, which is opposite to each other. For example, yellow and blue, magenta and green, cyan and red.
Contrast: A comparison between brightness and darkness.
Transmissive densitometer: An instrument use to measure the density and quality transparency.
Reflective densitometer: An instrument, use to measure the density and quality of paper.
Control strip: A precisely exposed film or paper, use for testing the quality of chemistry.
Replenishment rate: A numerical figure to indicate the amount of chemical required refilling the consumption or losses per unit area of the photosensitive material.
Overflow: The excessive solution that is flow out of the working tank; in order to keep in level.
Carry over: The carrying of chemical from one processing tank to another processing tank by the material to be processed.
Turn over: The mathematical assumption that old chemistry in a processing tank has been replaced by new chemistry.
Top up: Addition of water to recover the lost through vaporization.
Wallet: The inside envelope, use to contain photo.
Envelope: The outside envelope, use to collect job.
Negative sleevings: A plastic bag with continues section for storage of negatives.
Perforated: A design feature to make it easy to tear.
Non perforated: A design feature requires a cutter to