Craftsman using a treadle-operated polishing and finishing machine as used in France in the nineteenth century. These machines were used for the surface finishing of gold or silver plated decorative ware and jewellery. Items were polished on discs or grinding wheels rotating at high speed using brushes impregnated with abrasives of different sizes and composition. The brushes were of cotton,tampico or other natural fibres,steel or brass wire,and were used with or without an abrasive compound such as emery or polishing paste | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Terry, Sheila |
Bildgröße: | 3867 px × 4526 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |