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Recognised as some of the strongest envelopes in the world, their tear resistant paper substrate can withstand even the toughest of hands. 100% recyclable, sustainable and with overprintable benefits, these will ensure those first impressions last.
| Brand | Blake Secure |
| Closure | Peel & Seal |
| Colour | White |
| Dimensions | 352x250x25mm |
| Eco-Aware | Yes |
| Envelope Grade | Heavy Weight |
| Environment Support | FSC® Certified Product - Mix |
| Grammage | 125gsm |
| Grease Proof | Yes |
| Gusset | 25mm Gusset |
| Manufacturer | Blake Envelopes |
| Material | Paper Substrate |
| Opening | Short Edge |
| Size | B4 |
| Tear Resistant | Yes |
| Type | High Security Envelopes |
| Warranty | 5 Year Shelf Life |
| Water Impermeable | Yes |