Are essentially Thermoplastic Poly Ethylene Elastomer produced by coal hydrogen micro molecular process. Apertures are uniform and hence Ink release is even leaving no marks on back of paper.
| Property | Specification |
| Colour | Greyish Black |
| Density | 0.2250.015g/cm3 |
| Hardness | 542 (25C) |
| Ink absorption | 2502202 (25?C) |
| Size In MM | Thickness In MM |
| 450 X 178 | 3 |
| 450 X 178 | 4 |
| 450 X 178 | 7 |
| 330 X 110 | 7 |
