A practical treatise on artificial crown- and bridge-work . a block of lead and hammering the die into crown, which is usually formed of pure gold,^r^gold slightly alloyed, or gold lined with verythin platinum from XoT&! to No. jlk U. S. standard gauge, isthen made by first stamping a piece of plate (see page 110) inthe form of a cap of gold (A, Fig. 208). This cap is then placedon the cast and with the aid of the counter-die (B, Fig. 207)iged to the form of the crown B, Fig. 208. A piece of kidleather should be used to cover and protect the gold from thelend, and facilitate its removal
A practical treatise on artificial crown- and bridge-work . a block of lead and hammering the die into crown, which is usually formed of pure gold,^r^gold slightly alloyed, or gold lined with verythin platinum from XoT&! to No. jlk U. S. standard gauge, isthen made by first stamping a piece of plate (see page 110) inthe form of a cap of gold (A, Fig. 208). This cap is then placedon the cast and with the aid of the counter-die (B, Fig. 207)iged to the form of the crown B, Fig. 208. A piece of kidleather should be used to cover and protect the gold from thelend, and facilitate its removal from the counter-die. An allow-ance for the thickness of the leather must be first made, bydriving it, without the gold n the cast, into the counter-die toenlarge it Ft this i- not done, the gold is liable to be torn inthe swaging. ®- THE GOLD SEAMLESS CAP CROWN. 1Q9 Cuspid crdwns from which a portion of the gold on the labialaspect is to be removed, or which are to be used entire as asupport for bridge-work, can usually be advantageously fo
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherphila, bookyear1889
