Powder (substance)
From The Art and Popular Culture Encyclopedia
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A powder is a dry, bulk solid composed of a large number of very fine particles that may flow freely when shaken or tilted. Powders are a special sub-class of granular materials, although the terms powder and granular are sometimes used to distinguish separate classes of material. In particular, powders refer to those granular materials that have the finer grain sizes, and that therefore have a greater tendency to form clumps when flowing. Granulars refers to the coarser granular materials that do not tend to form clumps except when wet.
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See also
- Fragile matter
- Granular material
- Liquefaction
- Particle size (grain size)
- Paste (rheology)
- Powder mixture
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