ASTM D1545 for Viscosity of Transparent Liquids by Bubble Time Method
1. Scope
1.1 This test method covers the determination of the viscosity in bubble seconds by timing. The bubble seconds are approximately equal to stokes for most liquids.
1.2 The test method is applicable to transparent liquids that are free from crystalline or gel particles.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Terminology
2.1 Definitions:
2.1.1 viscosity - the resistance experienced by one portion of a liquid moving over another portion of the liquid. The absolute unit of viscosity in the cgs system is the poise which is expressed as dyne-seconds per square centimetre. Stokes are equal to poises divided by density. The absolute SI viscosity unit is the pascal-second.
