Dale Johnson carving a capital for the Cipriani Ballroom Entryway, shown on this page (this capital is the second from the left).
Stone has been carved using pneumatic hammers and chisels since the late 19th Century; the chisel is struck hundreds of times a minute by a vibrating piston. Force is controlled by adjusting the air pressure supplied to the pneumatic hammer.
This entry was posted on Saturday, July 28th, 2012 at 1:09 am. It is filed under .
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