Scratches, represented by triangular-shaped grooves, make the surface area greater.
Specific surface area (SSA) is a property of solids defined as ♣ the total surface area (SA) of a material per unit mass,[1] (with units of m2/kg or m2/g). Alternatively, it may ♣ be defined as SA per solid or bulk volume[2][3] (units of m2/m3 or m−1).
It is a physical value that can ♣ be used to determine the type and properties of a material (e.g. soil or snow). It has a particular importance ♣ for adsorption, heterogeneous catalysis, and reactions on surfaces.
Measurement [ edit ]
...and plastic Białecki rings of increased SSA
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