meaning of emulsion
1. Any liquid preparation of a color and consistency resembling milk; as: (a) In pharmacy, an extract of seeds, or a mixture of oil and water united by a mucilaginous substance. (b) In photography, a liquid preparation of collodion holding salt of silver, used in the photographic process.
2. a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin
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