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micromixing

n. The mixing of microscopic amounts of material (by molecular diffusion), or in microscopic mixers

Wikipedia
Micromixing

In pharmaceutics, micromixing is a process in which ingredient particles rearrange to form a blend. Development of pharmaceutical formulations requires understanding how the ingredients blend with each other and how the blending progresses through different stages. It is also important to establish in a scientific manner when the blending is considered complete, establishing the margins of blending performance, so that in production the blending is complete before the blending process stops.