A practical treatise on artificial crown- and bridge-work . THE QOLD SEAMLESS CAP CROWN. 105 form of the end of the root (Fig. 201). A counter-die is thenmade by punching a hole in the surface of a block of pure lead,and with a few blows of a hammer driving the die into it. A cap of gold can be formed by placing a piece of gold plate(preferably pure, No. 32 U. S. standard gauge) of suitable sizeupon a block of lead, and with an oval-shaped punch one-fourth ofan inch in diameter gradually driving it into the lead until the goldhas assumed the shape of a cap about a quarter-inch in depth (A,Fig.
A practical treatise on artificial crown- and bridge-work . THE QOLD SEAMLESS CAP CROWN. 105 form of the end of the root (Fig. 201). A counter-die is thenmade by punching a hole in the surface of a block of pure lead,and with a few blows of a hammer driving the die into it. A cap of gold can be formed by placing a piece of gold plate(preferably pure, No. 32 U. S. standard gauge) of suitable sizeupon a block of lead, and with an oval-shaped punch one-fourth ofan inch in diameter gradually driving it into the lead until the goldhas assumed the shape of a cap about a quarter-inch in depth (A,Fig. 201). The gold should be withdrawn from under the punchand annealed several times during the process. Caps can also bemade with a stamping-press such as was introduced by Dr. J. Patrick, of Belleville, 111. (See page 112.) Fig. 201. Fig. 202. Fig.
Size: 1378px × 1814px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectcrowns, bookyear1889
