Foreword
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Preparation of test samples
   7.1 General
   7.2 Samples with extractable ingredients
   7.3 Samples with auxiliaries (non-hydrolyzable
       and without ash) that are insoluble in hydrochloric
       acid, e.g. polymer modifiers, carbon fibres and certain
       flame-retardants
   7.4 Samples with auxiliaries that are soluble in dilute
       hydrochloric acid and/or cannot be determined from the
       ash owing to oxide formation, e.g. carbonates, metal
       powders and certain pigments
8 Calculation of mass of test portion
9 Selection of solvent
10 Procedure
   10.1 Cleaning of viscometer
   10.2 Preparation of test solution
   10.3 Measurements of flow times
11 Expression of results
12 Repeatability and reproducibility
13 Interconversion of the viscosity numbers determined in
   different solvents and Interconversion of the viscosity
   numbers determined in 96 % sulfuric acid and relative
   viscosities determined in accordance with ASTM D 789
   13.1 Viscosity numbers in 96 % (m/m) sulfuric acid and 90
        % (m/m) formic acid, respectively
   13.2 Viscosity numbers in 96 % (m/m) sulfuric acid and
        m-cresol, respectively
14 Test report
Annex A (normative) Determination of the concentration of
        commercial sulfuric acid (95 % to 97 %) and adjustment
        to 96 %
        A.1 General
        A.2 Apparatus and reagents
        A.3 Procedure
        A.4 Expression of results
        A.5 Adjustment of sulfuric acid and concentration