083r - - - - - Sand @ for lead
Recipe grey soot from the furnace of the silversmiths, quick lime, and flour,ana, moistened according to the art, being the finest possible.
at left top margin
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
Recipe hat felt burnt over 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.
at left top margin
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 & well sieved, 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
Recipe finely 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
Recipe p a tile little baked, ground & moistened in white wine with burnt black trasse paper. And if you add burnt horse dung, it will be all the better. Moisten with egg glair.
at left bottom margin
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 when 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 cellar cellar 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. And 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.