QB/T 2309 Eraser test
QB/T 2309 Test item Test name : National standard eraser test
QB/T 2309 Test info Test content :
Test items | Performance requirements |
plastic rubber | Hardness HS ≥ | 30 |
Word erasure rate /% ≥ | 80 |
Heavy metal mobility≥ | Erasers packaged in plastic shells, no migration allowed |
rubber rubber | Hardness HS ≥ | 45 |
Word erasure rate /% ≥ | 75 |
Hardness difference after aging ≥ | 6 |
QB/T 2309 Lead time test cycle : Regular 10 working days
QB/T 2309 Sample size Sample delivery specification: 10pcs