A rubbing ('' frottage'') is a reproduction of the texture of a surface created by placing a piece of paper or similar material over the subject and then rubbing the paper with something to deposit marks, most commonly

charcoal Charcoal is a lightweight black carbon residue produced by strongly heating wood (or other animal and plant materials) in minimal oxygen to remove all water and volatile constituents. In the traditional version of this pyrolysis process, cal ...

or pencil but also various forms of blotted and rolled ink, chalk, wax, and many other substances. For all its simplicity, the technique can be used to produce blur-free images of minuscule elevations and depressions on areas of any size in a way that can hardly be matched by even the most elaborate, state-of-the-art methods. In this way, surface elevations measuring only a few thousandths of a millimeter can be made visible. Common uses for this technique include: * Brass rubbing, to make copies of

monumental brass A monumental brass is a type of engraved sepulchral memorial, which in the 13th century began to partially take the place of three-dimensional monuments and effigies carved in stone or wood. Made of hard latten or sheet brass, let into the paveme ...

es * Forensic uses, including finding out what was written on a sheet of paper removed from a pad by rubbing the impressions left on subsequent sheets or other backing materials * Frottage, a surrealist art form * Stone rubbing, to make copies of patterns and inscriptions of gravestones or other incised or textured stone surfaces

References

External links

Artistic techniques Forensic techniques {{Forensics-stub