The heavier the content, the stronger the envelope needs to be.
Only an envelope which is appropriate for its contents will allow low-cost mechanical processing and provide effective protection against damage of all kinds.
Recommended envelope paper weights
|Envelope/format||Number of A4 sheets*||Paper weight**||Comments|
|Smaller than 14 x 9 cm||-||-||Special item|
|B6||1-12||100||Only select B format if C format is too small|
|B5||1-35||120||Only select B format if C format is too small|
|C4/B4||-||120||If only loose sheets are inserted, be sure to reinforce with a cardboard insert.|
* Standard paper of 80 g/m2
** in g/m2
Tip: if in doubt, always use a superior envelope quality with a higher paper weight.
Mailings with sharp-edged contents such as brochures with sharp corners, business reports, statistics or extensive reports are particularly prone to damage.
Tip: for this type of mailing, always use envelopes made of heavy (Kraft paper) or tear-proof paper.