Envelope C5 Clairefontaine Pollen 120 g/m² natural white, pH-neutral acid-free paper

Envelope C5 Clairefontaine Pollen 120 g/m² natural white is a high-quality mailing and storage envelope made from heavy 120 g/m² paper. The natural white, pH-neutral and acid-free composition protects documents against yellowing and chemical deterioration, making it suitable for business correspondence, invitations and archival storage. The envelope measures approximately 162 x 229 mm and is designed to hold A5-sized documents folded once or flat C5 materials while offering a firm, elegant feel and reliable handling.

Advantages

The Clairefontaine Pollen envelope combines a sturdy 120 g/m² paper with a natural white tone that maintains a professional appearance without optical brighteners. Its pH-neutral, acid-free quality preserves paper documents and printed materials over time, reducing the risk of discoloration and degradation. The envelope’s weight gives it resistance to creasing and tearing during mailing and handling, while the surface accepts writing and printing with common inks and toners.

Suitable for

• Business letters and corporate correspondence
• Invitations, greeting cards and formal announcements
• Archival storage of certificates, contracts and photos
• Mailing of brochures, flyers or promotional inserts folded to fit C5

When it may not be suitable

This envelope may not be the best choice when a transparent window is required for address visibility, as it is a standard closed envelope without window features. It is also not intended for heavy or bulky items beyond the thickness suitable for 120 g/m² paper; very thick stacks or rigid objects may cause tearing or deformation during mailing.

Key specifications

• Paper weight: 120 g/m²
• Colour: natural white
• Material properties: pH-neutral, acid-free
• Format: C5 (approx. 162 x 229 mm)
• Surface: writable and compatible with common printers and pens

How to use

Place the document inside the envelope so that the address area is centered on the front. Fold the flap securely after inserting the contents; use adhesive closure or sealing tape if stronger sealing is required for mailing. For printing addresses or barcodes, test one envelope first to confirm printer compatibility and feed settings. Store unused envelopes flat in a dry environment to maintain their shape and archival properties.

What to consider before purchase

• Confirm the C5 size is appropriate for your documents (approx. 162 x 229 mm).
• Check whether a windowed envelope is required for your mailing process.
• Consider the envelope weight (120 g/m²) relative to mailing costs and postage categories.
• Verify compatibility with your printer if you intend to print directly on the envelope.

Usage recommendations

For archival use, store filled envelopes in a cool, dry place away from direct sunlight. When mailing, reinforce seams or use additional protective packaging for documents with edges or corners that could cause punctures. For high-volume addressing, test print settings and feed a small batch first to avoid jams.