The problem of proprietary dyes,with special reference to alamar blue,a proprietary dye revealed

A short strip of adhesive transfer cellophane tape is applied to the face of the block to provide backing for the section during cutting and handling. The tape is sealed to the nuclear track plate with the section against the dry emulsion. After exposure the cellophane backing is removed by immersion in water, and the adhesive is dissolved from the section in unleaded gasoline. The section is hydrated and photographic and histological processing are carried out in the usual manner.