Polishing stone
A buffing stone is a tool for smoothing other, less hard materials. Polishing stones are usually made of agate or hematite and have a very smooth, but matt ground surface, which is rubbed over the material to be polished . This compacts and smooths it to such an extent that it takes on a shine itself .
Polishing stones are rounded in curved form, and often on a stem or booklet attached to can be handled better. They are available in numerous, often individual, designs. They are mainly required by gilders in order to polish gold leaf to a high luster during poliment gilding. The very sensitive stone also becomes high-gloss after prolonged use and has to be ground matt again.
In contrast to polishing with polishing pastes and powders, which polish through abrasion, almost no material is lost through rubbing with the polishing stone. Polishing stones are therefore used, among other things, for processing objects made of precious metal, but also for rubbing gold leaf and for polishing stucco marble or gold ink .
A related tool is the polishing steel .
Individual evidence
- ^ Kurt Sponsel, Wilhelm O. Wallenfang, Ingo Waldau: Lexikon der Anstrichtechnik 1st 8th edition, Callway Munich, 1987, ISBN 3-7667-0853-8 , p. 393.