Making and Knowing
A minimal edition of BnF Ms Fr 640 in English Translation

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Plaster

It needs to be well cooked, which you will recognize when cooking it in an iron or metal casket. Mix it with an iron rod and if it sticks to the iron, it is not cooked enough, and if it doesn’t then it is ready. The water with which you soak it has to be a little warm and the mould of the above mentioned earth or other, also should be a little hot. The plaster work does not last and the faces and delicate things break if one does not use glue.