This Allied Publication defines a method for determination of smoke indices for a material@ under three sets of specified laboratory conditions. The procedure is based on ISO 5659-2:1998 and as such describes an experimental method for measuring smoke production from specimens of the material@ using a single chamber test. This is supplemented to include detailed requirements for specimen preparation for particular types of material@ additional details for test and calibration procedures to enhance repeatability and reproducibility and requirements for data presentation including a formula for the calculation of a Smoke Index.