ISO 696:1975
ISO 696:1975

Status : Published (Under review)

This standard was last reviewed and confirmed in 2019. Therefore this version remains current.
Format Language
std 1 42 PDF
std 2 42 Paper
  • CHF42
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After 500 ml of a solution of the substance to be tested have flowed down from a height of 450 mm onto the surface of the same solution, the volume of foam formed is measured, This method is applicable to all surface active agents, but solutions of easy-hydrolizable substances do not give reliable results because the hydrolysis products accumulate in the liquid films and affect the steadiness of the foam.

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General information

  •  : Published
     : 1975-07
    : International Standard under systematic review [90.20]
  •  : 1
     : 5
  • ISO/TC 91
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