What is an emulsion in a photo?
Emulsion is a light sensitive material that is used to shoot film and photographic paper to make pictures appear. The emulsion consists of crystals sensitive to light, which are suspended in gelatin, and creates a mixture that can be evenly applied to a base such as paper, glass, celluloid or fabric. Technically, photo emulsion is not a real emulsion, because the emulsion, chemically speaking, is the suspensions of two or more liquids that cannot be mixed, and the emulsion of photography is a mixture of liquid and solid. When the base -covered base is exposed to light, sensitive crystals are subject to chemical change. After the exposure, the base can be developed with chemicals that allow the areas of darkness and light to occur, and then fixed by chemicals that stop the development process, freezing of darkness and light levels at a certain stage.
In the case of a film, an emulsion -coated base is used to create a negative, reverse image of what the camera has seen. Negative can be developed, repaired and then used to create POznic prints of the picture. These positive prints, better known as photographs, are created by exposing the paper coated with emulsions or other materials projection of the negative or creating contact prints in which it is negative directly against the photographic paper and light is briefly on to detect the paper. Contact prints tend to be of the highest quality because there is no distortion from the magnification process.
Color photography requires more layers of emulsion, each reacting to light of a different wavelength. It is also possible to play with various emulsions of photos and filter techniques and create things like an infrared film, a type of film that responds to thermal signatures, rather than light.
The materials used in the emulsion of photos are very sensitive and therefore the film and photographic paper must be stored in absolute darkness, even after exposure until they are developed and repaired. Usually only a short exposure of light is required to sufficiently reveal the emulsion,to make the image appear during the developing phase. In the camera, problems such as light leaks must be firmly controlled as they can faint and destroy the film.
photographers used them to mix their own emulsions and carefully applied them to glass photographic plates that could be exposed, developed, fixed and then used to develop prints on a glass, tin and other materials. Most modern photographers prefer to buy a film, enlarging paper and other supplies from companies that specialize in eating photographers, because the emulsion is difficult to handle and can contain dangerous chemicals.