| Characteristics of the indicators | Typical values | Testing method | 
| Color | Ash black | Visual Analysis | 
| Viscosity | 10-30Pa▪S | NDJ-5S,4#,12rpm,25℃ | 
| ≤20um | Scraper fineness test | |
| 1.4-1.8g/cm3 | Quality/ Volume | |
| Solid content | 60-70% | Quality | 
| adhesion | Level 1 | QFH | 
| square resistance | 50Ω@50μm | Four-probe tester | 
| hardness | 4H | GB6379-86 | 
| Operating temperature | ≤300℃ |  |