# ISO 12058-1

## Plastics - Determination of viscosity using a falling-ball viscometer - Part 1: Inclined-tube method

active, Most Current
 Organization: ISO Publication Date: 1 July 2018 Status: active Page Count: 12 ICS Code (Plastics in general): 83.080.01
##### scope:

This document specifies the general principles of a method, using an inclined‑tube falling‑ball viscometer, for determining the viscosity of polymers and resins in the liquid emulsified or dispersed state. It is intended for application to liquids over a viscosity measurement range of 0,6 mPa·s to 250 000 mPa·s (temperature range −20 °C to +120 °C) for which the shear stress and shear rate are proportional, i.e. the viscosity is independent of the shear rate. This ideal behaviour is commonly known as Newtonian behaviour. If a liquid differs significantly from this behaviour, different results can be obtained with the different balls of a falling‑ball viscometer or from viscometers with different geometries, such as capillary and rotational viscometers.

### Document History

ISO 12058-1
July 1, 2018
Plastics - Determination of viscosity using a falling-ball viscometer - Part 1: Inclined-tube method
This document specifies the general principles of a method, using an inclined‑tube falling‑ball viscometer, for determining the viscosity of polymers and resins in the liquid emulsified or dispersed...
April 1, 1997
Plastics - Determination of Viscosity Using a Falling-Ball Viscometer - Part 1: Inclined-Tube Method
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