NNN-P-1475 Revision B, June 18, 1976
PAPER, FILTER, ANALYTICAL
Includes all amendments and changes through Notice 1, January 31, 1996
Additional Comments: CNCL NO S/S
This specification covers analytical filter papers used in laboratories.
Filter paper shall be of the following types and classes
Type I - Qualitative Class 1 - For coarse and gelatinous precipitates Class 2 - For medium precipitates Class 3 - For fine precipitates Type II - Quantitative Class 4 - For fine precipitates hardened Class 5 - For coarse and gelatinous precipitates Class 6 - For medium precipitates Class 7 - For fine precipitates Class 8 - For fine precipitates, thin.