Envelope Anatomy

The Anatomy of an Envelope

The anatomy of an envelope illustrates why heavy ink coverage in certain locations on the envelope may show a faint impression on the reverse side or cause issues during printing and handling.

Understanding Envelope Construction

Envelopes are constructed from a single sheet of paper that is folded and glued together. This creates multiple layers of paper in certain areas:

• Seal Flap: The top flap that closes the envelope
• Throat: The opening of the envelope
• Side Seams: Where the paper overlaps on the sides
• Bottom Seam: The fold at the bottom of the envelope

Printing Considerations

When designing your envelope, keep these factors in mind:

• Avoid heavy ink coverage over seam areas
• Leave sufficient margin for postal barcoding
• Consider the direction of the paper grain
• Account for the address window if using window envelopes

Paper Weight and Quality

Envelope paper weight affects both print quality and mailing costs. Heavier stocks provide better print coverage but may increase postage. Our team can help you find the right balance for your project.