| Brand | Blake |
| Manufacturer | Blake Envelopes |
| Type | Plain Envelopes |
| Biodegradable | Yes |
| Country of Origin | Poland |
| Depth (mm) | 243 |
| Height (mm) | 243 |
| OEM | BLK93020 |
| Pre or Post Consumer? | Pre Consumer |
| Recyclable (Yes/No) | Yes |
| Recyclable Percentage | 70 |
| Width (mm) | 207 |
| Colour | Colours |
| ISO 14001 (Y/N) | Yes |
| Green Product | Yes |
| Closure | Peel & Seal |
| Material | Paper |
| Size | C5 |
| Contains timber or derived materials | Yes |
| Mill Name | Blake |
| Species of Tree | Picea Abies/Pinus Sylvestris |
| SMETA Registrated (Y/N) | Yes |
| Country of Harvest | Spain |
| Item Gauge (gsm) | 120 |
| Proof of Legality Obtained | Yes |
| Grammage | 120gsm |
| Biodegradable Information | 70 |
| Pre Consumer Recycled Content | 100 |
| Dimensions | 229x162mm |
| Gusset | No Gusset |
| Envelope Closure | Peel and Seal |
| Envelope Size | C5 |
| Envelope Type | Plain |
| FSC (Y/N) | Yes |
| Accreditation | FSC/ISO 14001/SMETA |
| Envelope Grade | Heavy Weight |
| Flap Position | Long Edge |
| Envelope Colour | Pillar Box Red |
| 2023 UK catalogue page no | 324 |
| 2024 UK catalogue page no | 324 |
| Minimum Recyclable Content (%) | 70 |
| Minimum Biodegradable Content (%) | 70 |
| FSC % | 70 |