Envelope C4 NC Koperty SK white 90 g/m² 229×324 mm pack 25

Envelope C4 NC Koperty SK white 90 g/m² 229×324 mm pack 25 is a standard C4 envelope designed to hold A4 documents without folding. Made from 90 g/m² white paper, it offers a balance of opacity and durability for everyday office mailing and document storage. The envelope features a standard C4 flap and a blue underprint to help protect contents from show-through and improve confidentiality during handling.

Advantages

These envelopes combine medium-weight paper with a smooth white finish that ensures readable addressing and reliable ink adhesion for printing or handwriting. The blue underprint reduces visibility of contents while maintaining a neutral exterior appearance. Supplied in a pack of 25, they offer convenient quantity for office use, easy storage, and consistent sizing for filing systems.

Suitable for

• Mailing A4 documents without folding
• Office correspondence and invoices
• Document storage and internal filing
• Printing addresses and barcodes on envelopes

Key specifications

• Format: C4 (fits A4 sheets flat)
• Paper weight: 90 g/m²
• Color: white with blue underprint
• Dimensions: 229 × 324 mm
• Closure: standard C4 flap suitable for glue or adhesive strips
• Pack size: 25 envelopes

How to use

Insert unfolded A4 documents into the envelope so that edges align with the sides and the flap can close securely. Address the envelope by handwriting or use laser/inkjet printers designed for envelope printing. Seal the flap according to the adhesive type provided, and apply postage or labels as required. Store unused envelopes flat in a dry environment to prevent curling or moisture damage.

Usage recommendations

For best results when printing addresses or barcodes, test a single envelope in your printer to confirm feed and print settings. Avoid overfilling to maintain a neat appearance and reliable sealing. Keep packs in a cool, dry place to preserve paper integrity.