Gives a method for determining the bulking thickness, apparent bulk density, compressibility and compressibility index of soft creped tissue paper. May also be suitable for use with other soft, compressible papers. Not intended for use on uncreped paper. Covers definitions, principle, apparatus, sampling, conditioning, preparation of test pieces, procedure, expression of results, precision, test report, compressibility and compressibility index and verification of micrometer performance and calibration.