For mounting all types of specimens which are not damaged by heat and pressure. Available in phenolic, epoxy, diallyl phthalate or transparent LuciteŽ. Phthalate has a lower coefficient of expansion than phenolic, thus exhibits less shrinkage and closer bond to the sample. Epoxy overcomes edge retention problems. In 5 lb packages except for 50670-05, which is a 4 lb package.