IP 146: Determination of foaming characteristics of lubricating oils

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  • Method adopted/last revised: 2010
  • Method reapproved: 2019
  • REF/ISBN: IP146-2935507
  • Status: Current
  • First printed in STM books: January 2010


This document specifies a test method for determining the foaming characteristics of lubricating oils at specified temperatures. It is applicable to lubricants which may or may not contain additives to modify or suppress the tendency to form stable foam.

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