Planishing

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Diagram of planishing, showing planishing hammer, workpiece, and planishing stake
Diagram of planishing, showing planishing hammer, workpiece, and planishing stake

Planishing is a metalworking technique used to smooth sheet metal.

After a piece of metal has been roughly formed by techniques such as sinking or raising, the surface is will have irregular indentations and bumps. To remove these imperfections, the piece is hammered between a flat or very slightly curved hammer and a special forming object known as a planishing stake. Using repeated, relatively soft blows, the piece is smoothed toward the curvature of the stake.

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