Conventional plastic sections are made on such ultramicrotomes working at room temperature. We use diamond knives which are fit on the side of a water receptacle, the sections are floating at the surface of the water as they are coming off the knife and ribbons can be obtained which are necessary for serial sections preparation. Formvar coated grids are used for picking up the sections and serial sections ribbons are retrieved on slot grids (with a unique central slot 2x1 mm) on which ribbons are loaded parallel to the long axis of the grid.

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