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WHY IS A GEL CALLED GEL?
19th-century Scottish chemist Thomas Graham coined the word “gel” by shortening the word “gelatine.”
A gel is a sol in which the solid particles are meshed such that a rigid or semi-rigid mixture results. Cross-linking within the gel’s polymer or colloidal network causes a gel to behave as a solid in its steady-state and makes it feel tacky.