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Mailing envelopes are made of monolayer, transparent, coloured or metallic film out of multi-layer co-extruded films usually white or grey outside and black inside for maximum confidentiality. They can be supplied in permanent or re-sealable self-seal flaps and printed up to eight colours. The main advantages are:
- Water repellant and tamper proof

- Opaque film for confidentiality
- Lightweight - resulting in savings on postage
- Saves storage space
- Custom made with different print designs each time for maximum impact
- Option to block-head
Some sizes of plain and block-headed mailing envelopes are available ex stock.
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