Spotting (photography)
Encyclopedia
In the production of photographic prints
Photographic printing
Photographic printing is the process of producing a final image on paper for viewing, using chemically sensitized paper. The paper is exposed to a photographic negative, a positive transparency , or a digital image file projected using an enlarger or digital exposure unit such as a LightJet printer...

, spotting is a type of retouching
Photo manipulation
Photo manipulation is the application of image editing techniques to photographs in order to create an illusion or deception , through analog or digital means.- Types of digital photo manipulation :...

concerned with correcting minor flaws in the finished print with specially made paint
Paint
Paint is any liquid, liquefiable, or mastic composition which after application to a substrate in a thin layer is converted to an opaque solid film. One may also consider the digital mimicry thereof...

s, dye
Dye
A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber....

s, pencils and pens.

White spots on gelatin-silver prints made from negatives are caused by dust adhering to the negative
Negative (photography)
In photography, a negative may refer to three different things, although they are all related.-A negative:Film for 35 mm cameras comes in long narrow strips of chemical-coated plastic or cellulose acetate. As each image is captured by the camera onto the film strip, the film strip advances so that...

 or paper during exposure. Prints from positive transparencies exhibit black marks.

White spots can be carefully darkened using a fine paintbrush and a dye of the appropriate colour. A small amount of dye, which should be very weak, is needed. The spot will darken as dye accumulates in the gelatin layer.

Black spots on gelatin-silver prints are caused by holes in the negative's emulsion. These can be removed by careful knifing of the gelatin layer.

For spotting work, always use a magnifying glass and a good light source.
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