ERL 4206, the major component of Spurr resin, is no longer available. However, this Agar low viscosity resin has all the same advantages of Spurr resin. It gives rapid penetration, good contrast, ease of sectioning, stability under the electron beam and good staining characteristics. It can be used for both optical and electron microscopy applications. The hardness of the block can be adjusted by changing the ratios of the two hardeners VH1 and VH2. None of the components has the known carcinogenicity of ERL 4206 but, as with the laboratory use of all resins, care should be taken at all stages of handling with the use of gloves and a well ventilated area.
The kit consists of: