In Photography, What is Emulsion?
Emulsion is a light-sensitive material which is used to coat film and photographic paper so that images can be made to appear. The emulsion consists of light-sensitive crystals which are suspended in gelatin, creating a mixture which can be evenly applied to a base such as paper, glass, celluloid, or fabric. Technically, photo emulsion isn’t a true emulsion, since an emulsion, chemically speaking, is a suspension of two or more liquids which cannot be blended, and photo emulsion is a mixture of a liquid and a solid. For a traditional black and white photograph, the emulsion is often made with silver halide crystals. When the emulsion-coated base is exposed to light, the sensitive crystals undergo a chemical change. After the exposure, the base can be developed with chemicals which allow areas of darkness and light to appear, and then fixed with a chemical which stops the development process, freezing the levels of darkness and light at a particular stage. In the case of film, the emuls
Related Questions
- My lab has a Neodymium frequency-doubled laser. Will this laser work with Slavich emulsions and if so, which emulsion is the best for transmission holograms and which for reflection holograms?
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- In Photography, What is Emulsion?
