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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 |