ASTM D2663 – Standard Test Methods for Carbon Black—Dispersion in Rubber
Description:
Significance and Use
5.1 Visual dispersion ratings correlate with certain important physical properties of the compound. A rating of 5 indicates a state of dispersion developing near maximum properties, while a rating of 1 would indicate a state of dispersion developing considerably depressed properties. Normally, the visual dispersion ratings indicate the following levels of compound quality:
| Visual Dispersion Rating | Classification |
| 4 to 5 | High |
| 3 to 4 | Intermediate |
| 2 to 3 | Low |
| 1 to 2 | Very low |
Scope
1.1 These test methods cover the degree of dispersion of carbon black in rubber. Four test methods are described as follows:
| Sections | |
| Test Method A—Visual Inspection | 3 – 11 |
| Test Method B—Agglomerate Count | 12 – 22 |
| Test Method C—Microroughness Measurement | |
| with Profilometer | 23 – 33 |
| Test Method D—Microroughness Measurement with IFM | 34 – 42 |
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
ASTM D2654