ANSI/TAPPI T 401 os-74

Fiber Analysis of Paper and Paperboard

Org/Number ID	ANSI/TAPPI T 401 os-74
Alternate Organization ID / number
Version(s)	1975
Bin #	221
Comments	TAPPI changed their naming conventions of standards. All "OM" (Official Test Method) used to be known as "OS" (Official Standard) or "M" (Official Standard). This standard is approved as a National American Standard.
Status	Present
Record last updated	July 14, 2026, 1:03 pm

This is not the most recent edition of this standard.

Newer edition note: ANSI/TAPPI T 401 om-20