Page 479 - My FlipBook
P. 479
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475
with impunity the highest degree of heat, and the most sud-
den transitions of heat and cold
: it was this that determined
me to enter it into the composition of my teeth, to make
them more susceptible of the action of fire in the operation
of soldering.
I consider this earth as an excellent conductor of caloric
;
and also the teeth with which it is combined are harder and
less brittle its colour does not oppose the colouring princi-
:
ple of the oxides with which I combine it
; on the contrary,
it combines very well with them, and produces the most sat-
isfactory result.
I use only that which has been subjected to the first bak-
ing in the potter's furnace, and it is from him I procure it.
§ in. Of Petunze, or the Flint-stone of Limoges.
Petunze is a flint-stone reduced to a very fine powder,
which serves as a covering for porcelain.* It is used only
for enamelling kaolin, but dentists have made use of it for the
base of oxides, to serve as a colouring for the teeth which
they make.
It is very fusible, and its fusibility and transparency must
be checked, by the addition of a proper quantity of kaolin.
§ iv. Of the Oxide of Titanium.
The oxide of Titanium ought to be considered the first for
colouring incorruptible teeth ; used by itself in different pro-
fit is said (he manufacturers of porcelain put other materials with pe-
tunze to make their enamel, but that is of no importance to us
; it is sufll-
cient to know what furnishes enamel that answers the best for the fabrica-
tion of incorruptible teeth
—
475
with impunity the highest degree of heat, and the most sud-
den transitions of heat and cold
: it was this that determined
me to enter it into the composition of my teeth, to make
them more susceptible of the action of fire in the operation
of soldering.
I consider this earth as an excellent conductor of caloric
;
and also the teeth with which it is combined are harder and
less brittle its colour does not oppose the colouring princi-
:
ple of the oxides with which I combine it
; on the contrary,
it combines very well with them, and produces the most sat-
isfactory result.
I use only that which has been subjected to the first bak-
ing in the potter's furnace, and it is from him I procure it.
§ in. Of Petunze, or the Flint-stone of Limoges.
Petunze is a flint-stone reduced to a very fine powder,
which serves as a covering for porcelain.* It is used only
for enamelling kaolin, but dentists have made use of it for the
base of oxides, to serve as a colouring for the teeth which
they make.
It is very fusible, and its fusibility and transparency must
be checked, by the addition of a proper quantity of kaolin.
§ iv. Of the Oxide of Titanium.
The oxide of Titanium ought to be considered the first for
colouring incorruptible teeth ; used by itself in different pro-
fit is said (he manufacturers of porcelain put other materials with pe-
tunze to make their enamel, but that is of no importance to us
; it is sufll-
cient to know what furnishes enamel that answers the best for the fabrica-
tion of incorruptible teeth
