ASTM D3997/D3997M-16

5.1 Briquettes and blocks of coke prepared in accordance with the laboratory procedures of this practice will have flat, scratch-free surfaces suitable for examination with a microscope using reflected light illumination. The polished surface of the samples prepared using this practice will contain particles representative of the original gross sample. Polished blocks of coke will preserve the porosity and undisturbed distributions of carbon forms required in the production of sequences of stitched and tiled image mosaics. Such images are required for microscopic porosity measurement.

5.2 Samples prepared by this practice are used for microscopical determination of the textural components in coke (see Test Method D5061) and the measurement of coke reflectance.

1.1 This practice covers laboratory procedures for the preparation of granular and lump coke into briquette and block samples for examination with a reflected light microscope. The samples prepared are used for examination and identification of the components in coke and the measurement of the reflectance of coke.

1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.