Envelope C4 NC Koperty HK white 90 g/m² 229×324 mm with gray inner print, pack of 50

Envelope C4 NC Koperty HK white 90 g/m² 229×324 mm with gray inner print, pack of 50 are C4-size paper envelopes produced by NC Koperty. Made from 90 g/m² white paper, each envelope measures 229 × 324 mm and is sized to hold untrimmed A4 documents without folding. A gray inner print provides discreet masking of contents, making these envelopes suitable for routine office mailings, invoicing and filing. The pack contains 50 envelopes designed for compatibility with standard postal and courier services.

Advantages

The 90 g/m² paper offers a balance between durability and a lightweight feel suitable for mailing and storage. The C4 dimensions allow documents to be inserted flat, reducing creasing and preserving presentation. An inner gray print increases privacy by minimizing visibility of printed or typed content through the paper. The standardized size and construction ensure reliable performance in sorting, handling and stacking.

Suitable for

• Sending invoices, contracts and official correspondence
• Storing and archiving A4 documents without folding
• Office mailings and bulk dispatches
• Private and business document distribution via post or courier

Key specifications

• Format: C4 (229 × 324 mm)
• Material weight: 90 g/m² paper
• Color: white exterior with gray inner print
• Quantity: 50 envelopes per pack
• Designed for untrimmed A4 documents inserted flat

How to use

Place A4 documents flat into the envelope without folding to maintain document condition. Insert the documents so that the printed or handwritten information faces away from the envelope side where the gray inner print provides additional privacy. Seal the envelope following the flap design: if adhesive is self-seal, press firmly to secure; if moisture-activated, moisten the glue strip and press closed. Label the exterior with recipient and sender information and apply the appropriate postage before dispatch.

Usage recommendations

For secure mailing, avoid overfilling the envelope beyond its seams and consider reinforcing heavy inserts with an inner cardboard sheet. Store envelopes flat in a dry environment to prevent moisture-related deformation and to preserve the integrity of the adhesive closure.