Envelope MAILmedia Kuvermatic C6/5 114 x 229 mm, self-sealing windowless

MAILmedia Kuvermatic C6/5 envelope sized 114 x 229 mm is a windowless mailing envelope designed for standard correspondence, invoices and general document dispatch. The envelope features a self-sealing closure that eliminates the need for moistening or additional adhesive tape, speeding up preparation for bulk mailings and everyday office use. Its C6/5 format accommodates folded A4 or A5 documents and printed correspondence while preserving a professional appearance.

Advantages

The windowless design protects content privacy and is compatible with a wide range of printed materials. The self-sealing strip ensures consistent closure and reduces handling time compared with gummed flaps. Constructed from durable paper, the envelope maintains shape during handling and transit and is suitable for both manual and machine processing.

Suitable for

• Business letters and invoices
• Mass mailings and direct mail campaigns
• Internal office correspondence
• Personal letters and documents
• Document storage and archiving before dispatch

Key specifications

• Format: C6/5 (114 x 229 mm)
• Type: Windowless envelope
• Closure: Self-sealing strip (peel-and-seal)
• Material: Paper envelope suitable for mailing and handling
• Compatibility: Suitable for manual and standard envelope processing equipment

How to use

Place folded documents inside the envelope so that content is centered and does not exceed the flap area. Remove the protective strip from the self-sealing closure and press the flap firmly along the seam to secure the seal. For bulk mailings, load sealed envelopes into trays or mailing machines according to equipment guidelines. Check addressing and postage requirements before dispatch.

Recommendations

Store envelopes in a dry, cool environment to prevent moisture absorption and deformation. Avoid overfilling; keep contents within the recommended folded dimensions to ensure reliable sealing and machine compatibility. For confidential documents, consider additional inner wrapping or security inserts if extra protection is required.