UNI EN ISO 307 : 2013

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Preparation of test samples
8 Calculation of test portion
9 Selection of solvent
10 Procedure
11 Expression of results
12 Repeatability and reproducibility
13 Relationship between the viscosity number
   determined in 96% (by mass) sulfuric
   acid solution and the viscosity determined
   in various solvents
14 Test report
Annex A (informative) - Determination of the
        concentration of commercial sulfuric acid
        (95% to 98%) and adjustment to 96% by
        titration
Annex B (informative) - Determination of the concentration
        of sulfuric acid (95% to 98%) and adjustment
        to 96% by flow time measurement in a small
        capillary viscometer
Annex C (informative) - Determination of the concentration
        of commercial formic acid and adjustment to
        90% by titration
Annex D (informative) - Determination of the concentration
        of commercial formic acid and adjustment to
        90% by density measurement
Annex E (informative) - Relationship between the viscosity
        number determined in 96% (by mass) sulfuric
        acid solution and the viscosity determined in
        various solvents
Bibliography

Defines a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents.