Contents 1. Subject content and applicable scope 2. Normative references 3. Method summary 4. Instruments and materials 5. Preparatory work 6. Test steps 7. Precision 8. Report Annex A Technical conditions of photoelectric color comparator of petroleum products (Supplement) Annex B Preparation method of colorimetric solution used to test standard colored pieces (Supplement) Annex C Comparison relation of color number between this standard and GB/T 6540 (ISO color number) (Supplement) |