
~~~~~~~~~~~~~~~150v~~~~~~~~~~~~~~~

Molding hollow

This iron wire point, which is put thusly
bi through the hole, is to better hold the
noyau & keep it from shifting. All of this being
d thusly arranged, lay your mold on the
table, the hole at the top, as it is here marked on the side,
& then adapt a circle of soft clayaultr, two fingers high, around
the hole, like for other molds. And then wet your molding sand,
moderately thick, & throw it through the hole until it is well
filled, up to the surface of the clay circle. But take
heed to not throw r in through the middle of the
hole, but rather from the side, for, because the already made
mold, drinks and sucks the moisture of the new. The
new one that you throw in which dries quickly, on the edge of
the mold, being quickly dry, s would
obstruct the mold & it would not finish filling. And when
you throw from the side, if you recognize that it is obstructed, you can
clear a path. Having thrown in, blow on the fthe wet gate, & put, a few times, the
end of your finger in the hole, po
or some small point, to unblock it, & make the hollow
wax fill up. Throw in, at the end, the sand wetted a little
thickly to give strength to the mold, for water coming
to the surface sof the mold,
always makes it softer. Having set, scrape off the clay
circle & the excess which is on the hole, through which you
cast the noyau & nothing will be discernable. When your
mold is thusly prepared, lute it all around with the
same sand which served for the molds. Next, reheat it in a slow
fire, at the beginning, & the mouth of the gate at the bottom, in
order that the wax flows out gently. For if you were
to give it great heat until the wax came out, it would boil
inside & leave some blisters & lumpy things, although



This point is placed in the middle & through the hole of
the gate, when the mold is in several pieces, like a
turtle, and this is done in order that the noyau does
not shake. But when the mold is only of two pieces, it is not necessary
to put points in the middle of it.





Before casting the noyau, make some notches all around the hole
through which you want to cast, in order to always better secure the
mold.



Mixed tallow is the reason that, when emptying the wax,
the hole does not become obstructed. One needs halftallow & halfblack wax.



All very thick pieces come out better in hollow, because a thick mass of
mostly lead remains hot a long time & eats the
mold.



You can, after the cast is done, mold a the part of the shell
of the belly where you have made the hole on the natural
one, and reattach it with
solder.

XNote, that after your noyau is cast, it is
better to put the mold in hot water to open it, in order
to remove the most wax that you can, always softening
a it in hot water. For the less wax
that remains in it, the better, in order that, when reboiling a lot in
the mold when you reheat it, no blisters or lumps are made in
it. And then, if there is hardly any wax, you will not need to
reheat it as much. When opening the mold, the cast will break.
But it can easily be repaired, even though you
castA

