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

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Chassis used by Germans

Germans who work in small scale make ‘chassis” not of glass but of canvas oiled with clear turpentine varnish, that is half of turpentine oil and almost half of turpentine, because such light, being less bright than glass, makes the lines appear thicker. And when they want to make something more delicate, such as veins and similar things, they use brushes made of two or three rat hairs. .