ASTM-C721 › Complete Document History
Standard Test Methods for Estimating Average Particle Size of Alumina and Silica Powders by Air Permeability

Complete Current Edition:
   2020 EDITION - Standard Test Methods for Estimating Average Particle Size of Alumina and Silica Powders by Air Permeability - Oct. 12, 2020

Obsolete Revision Information:
   2015 EDITION - Estimating Average Particle Size of Alumina and Silica Powders by Air Permeability - Dec. 30, 2015
   2014 EDITION - Estimating Average Particle Size of Alumina and Silica Powde - Sept. 1, 2014
   WITHDRAWN - WITHDRAWN IN 2002 - Dec. 1, 2002
   1981 R97(E1) EDITION - SECTION 10 CHANGED EDITORIALLY - Oct. 1, 1997
   1981 R92(E1) EDITION - EDITORIALLY CORRECTED - Dec. 1, 1992
   1981 R88(E1) EDITION - EDITORIALLY CORRECTED - Sept. 1, 1988
   1981 EDITION - Estimating Average Particle Size of Alumina and Silica Powde - Sept. 1, 1988