A residue left on aluminium that has been wet and allowed to dry naturally. This is very difficult to remove and cannot be improved by polishing or anodising.
Work Hardening, Strain Hardening
The increase in strength and hardness with a general loss of ductility that results from cold working of a work-piece.
Related terms: Cold Working
A product made by hot, or hot and cold, plastic deformation by the rolling, extruding or forging of a cast product.