Directions for the study of micanite

Much difficulty has been experienced in the past in determining the properties of micanite, especially the percentage of adhesive, mica and reinforcement which it contained. Since in some classes of micanite the quantity of adhesive has to be quite small, slight differences in the method of test produce large percentage variations in the results, and this has been a source of friction between user and manufacturer. The methods of test given herein for the determination of these properties have been arrived at after much investigation, with the co-operation of manufacturers´ and users´ experts. In view of the widely differing characteristics of micanite products, some notes on their manufacture, use and characteristics are included for the guidance of those interested. The Director of the E.R.A. will value comments and criticism from those who have occasion to use any of the tests.