Page 504 - My FlipBook
P. 504
:
500
may be enamelled with the enamels in which the numbers
do not correspond. It is by this means we obtain a vast
number of shades, which would be difficult to obtain by other
means.
Having, at length, given various formulas for the composi-
tion of the pastes and enamels which serve to establish the
different shades of the teeth, and to actually suit every mouth,
we shall now speak of the manner in which the moulds are
made intended for modelling the teeth.
§ xii.— Manner of Making the Moulds that are used
for Incorruptible Teeth.
We have observed in the second section of this work, that
the teeth made of porcelain, arc wanting, generally, in shape,
which is never natural ; for we cannot repeat it too much,
the exact imitation depends upon three indispensable condi-
tions : 1st. the shape ; 2d. the position ; 3d. the colour.
And it is certain, if the artificial teeth want any of these con-
ditions, they will not completely imitate the natural ones
but if, on the contrary, they come up to it, they approach
the natural ones as much as possible.
To arrive at this point, it is necessary to have moulds that
faithfully represent the natural teeth. For that purpose,
punches of iron must be made, imitating in fineness of shape,
the true teeth, and augmenting their diameter at least one
third more than is natural, which admits of their retracting
when submitted to the baking process.
These punches serve to stamp the little moulds of copper
which are soldered to a band of white iron, after havinsr been
first prepared and stamped.
500
may be enamelled with the enamels in which the numbers
do not correspond. It is by this means we obtain a vast
number of shades, which would be difficult to obtain by other
means.
Having, at length, given various formulas for the composi-
tion of the pastes and enamels which serve to establish the
different shades of the teeth, and to actually suit every mouth,
we shall now speak of the manner in which the moulds are
made intended for modelling the teeth.
§ xii.— Manner of Making the Moulds that are used
for Incorruptible Teeth.
We have observed in the second section of this work, that
the teeth made of porcelain, arc wanting, generally, in shape,
which is never natural ; for we cannot repeat it too much,
the exact imitation depends upon three indispensable condi-
tions : 1st. the shape ; 2d. the position ; 3d. the colour.
And it is certain, if the artificial teeth want any of these con-
ditions, they will not completely imitate the natural ones
but if, on the contrary, they come up to it, they approach
the natural ones as much as possible.
To arrive at this point, it is necessary to have moulds that
faithfully represent the natural teeth. For that purpose,
punches of iron must be made, imitating in fineness of shape,
the true teeth, and augmenting their diameter at least one
third more than is natural, which admits of their retracting
when submitted to the baking process.
These punches serve to stamp the little moulds of copper
which are soldered to a band of white iron, after havinsr been
first prepared and stamped.
