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Sand @ for lead

Recipegrey soot from the furnace of the
silversmiths, quick lime, and
flour,ana, moistened according to the art, being the
finest possible.


The grey soot of locksmiths, which is held in the
forge, is very fine once ground, molds very neatly, &
releases very well.


Sand for copper medals

Recipehat felt burntover a covered
fire, dross of iron, & burnt bone, all of which
ground very finely & crushed & watered with saltwater;
& make a paste of it & mold it, & wipe it over a
straw fire.  @ These three sands, pulverized and very finely
ground on porphyry, mold well, and I think that
separately each of them is very good. Burnt hat felt molds very
neatly and releases very neatly.

Plaster molds very neatly but it becomes porous. Bone has
scarcely any body unless it has iron dross. Felt makes it
release. 


Another sand

Charcoal of vine shoots & clay earth,
bien recuitte & wellsieved, as much of one as the other, & join them together
with well-beaten eggs’ glair, then calcine in the
furnace, & to use it, moisten it with vinegar.


Another for lead

Recipefinely crushed slate, &
calcined pumice stone mixed together. Calcine them in
a well covered pot, & thrice stoppered over a good fire,
& each time moisten them with varnish.


Another

Recipep a tile little baked,
ground & moistened in white wine with burnt black
trasse paper; & if you add burnt horse
dung, it will be all the better. Moisten with egg glair.

Trasse paper burnt over a closed fire is reduced just as
charcoal & very soft black, molds neatly & makes it
release well mixed with the others.


Excellent sand

Alabaster calcined in a crucible over
charcoal fire, so that, touching it, it turns into powder. Once
cold, pulverise it finely & pass it through a double sieve
& and render it as if impalpable. And d with one
lb of alabaster, one needs one
℥ of sal ammoniac. Mix well &
incorporate everything together, then put them in a
cellarcellar or a damp
place. And with this paste, mold what you will need, & next
dry the mold in the fire, & cast whatever you wish, while
the sand is hot; & you will cast as neatly as the main one, &
the sand can still be used by placing it in a damp place
& drying it in the fire.

