What is emulsion?
General Info: Emulsions are a combination of two unblendable substances, one of which is referred to as the “continuous phase” and the other the “dispersed phase.” Emulsions are unstable by nature and typically appear cloudy. Emulsion functions just like a jar of oil and water. When left alone the two phases will stay separated. However when energized, through shaking, stirring, homogenization, or other processes the two phases intermix but do not blend. The cloudy appearance is due to phase interference which is the refraction of light between the two intermixed phases. Some emulsions are more stable than others. Some very unstable emulsions will separate quickly unless constantly energized. The phenomenons of separation are flocculation (clumping), creaming (concentration of particles to either top or bottom) and coalescence (formation of a layer of liquid). While emulsions an colloids are very similar terms, emulsion refers to liquids. As used in screen printing: Photoemulsion is us
