A low viscosity epoxy resin with comparable performance to Spurr's except that a softer block is usually produced. It has good sectioning Technovit 9100 characteristics, electron beam stability and low background 'grain'. A good resin for LM use, easy to handle and much less toxic than Spurr's being comparable with Araldite. An exceptional advantage is For Dense and Mineralised Tissue. that the monomer is water miscible and can be used to dehydrate