tax stamps
SORA tax stamps is a woodfree uncoated graphic paper with UV visible security.
Paper specification
| STANDARD | 80 | 110 | Tolerance | |
|---|---|---|---|---|
| GRAMMAGE [g/m2] | ISO 536 | 80 | 110 | ± 2 |
| SPECIFIC VOLUME [cm3/g | ISO 534 | 1,13 | 1,08 | ± 0,07 |
| SMOOTHNESS BENDTSEN [ml/min] | ISO 8791-2 | 120 | 120 | ± 40 |
| RELATIVE HUMIDITY [%] | DIN 53118 | 47,5 | 47,5 | ± 7,5 |
| D65 BRIGHTNESS [%] | ISO 2470-2 (D65/10°) | 85 | 85 | |
| OPACITY [%] | ISO 2471 | 85 | 97 |