012r - - - - - Molding sulfur
Sulfur is made beautiful mixed with soot black or with pulverized sanguine, which renders it harder and stronger. Having let it melt well until it becomes liquid, like oil, mix it with verdigris, and you m will cast in plaster very neat a lizard, or something else.
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You must not cast that which has not become well cooled & that which has not lost all its lumps & bubbles, and has not settled down well & become smooth like water. The soot black gives it a fine luster & makes it neater. The most beautiful yellow sulfur must be used, for the greyish & lively sulfur is not good. Do not cast in wind & cold, for it would become porous.
Chimolee
The terre chimolee, otherwise known as fuller’s earth, from which they finish the cloth, is excellent for molding hollow or in relief; & if you want to reheat it, it must first be warmed, & reheat it gently on a low, indirect fire, & little by little, otherwise it would crack. Put the figure to reheat in a pot in an oven, or in a covered oven. It is very malleable, clean & fine. You can make a cavity for animals of chimolee & cast lead in it.
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The work needs to be dried for 4 or 5 days before you reheat it. When you mold & make a cavity from chimolee, do not press too hard, but softly, for it would break.
Paper
The whitest & finest is the best. And when the cavity is quite clean, as of sulfur or baked chimolee, it is made very neatly. You can give it one or two layers of white with a border of gold to imitate alabaster. And after you have applied the white, you can burnish it with the tooth. But in order for it to be burnished, one needs to mix the lead white with glair of egg & peelings from the fig tree. Or better, varnish your work with white varnish. In addition when you are molding with paper, as it starts to dry, burnish from the back with the tooth.
Plaster
That from the mountains is greyer, and the the one from the region of Albi is whiter. It must be heated over a closed fire, such as a reverberatory furnace or fours de barbiers. And the most freshly cooked is the best. It must be finely ground on marble. After having prepared your cavity from sulfur or something else, & oiling it, & having enclosed it in a circle, temper not too thickly your plaster with water, & separate it well with your finger, and if it makes lumps, throw in more powder of the said plaster & grind it with the finger until +
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+ it makes no more lumps. Then cast & sprinkle again with plaster powder & leave to set well, then scrape off the powder.