Syneresis(redirected from Crasis)
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a spontaneous contraction of a jelly or gel accompanied by exudation of the liquid. Syneresis occurs as a result of a closer packing of the three-dimensional structural network, which in jellies is formed by macromolecules and in gels by particles of the disperse phase. During syneresis, the structured system is converted into a thermodynamically more stable state. Syneresis is one manifestation of aging or “ripening” in different types of disperse structures, as well as in polymer and biological systems. It has considerable practical significance in the preparation of food products (cheese, cottage cheese), in rubber technology (preparation of latex products), and in the formation of chemical fibers from spinning solutions.