---
product_id: 489072335
title: "Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use"
brand: "triplast"
price: "HK$141"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size
store_origin: HK
region: Hong Kong
---

# C5 size 229x164mm Blue security pattern inside Self-seal adhesive closure Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use

**Brand:** triplast
**Price:** HK$141
**Availability:** ✅ In Stock

## Summary

> 🔐 Seal your secrets in style—secure, sleek, and sustainable!

## Quick Answers

- **What is this?** Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use by triplast
- **How much does it cost?** HK$141 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size)

## Best For

- triplast enthusiasts

## Why This Product

- Trusted triplast brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Printer-Ready:** Compatible with most inkjet and laser printers for seamless office workflow.
- • **Effortless Sealing:** Self-seal adhesive means no tape, glue, or licking—just fold and press.
- • **Eco-Conscious Choice:** Made from PEFC-certified paper sourced from sustainably managed forests.
- • **Versatile Everyday Use:** Perfect for mailing invoices, letters, brochures, and more in home or office.
- • **Confidentiality Guaranteed:** Blue high-security pattern scrambles text to keep your documents private.

## Overview

Triplast C5 Self Seal Security Envelopes (50 pack) offer a 229x164mm fully opaque design with a blue internal security pattern to protect confidential contents. Featuring hassle-free self-seal adhesive and printer compatibility, these 90gsm white envelopes are ideal for everyday home, office, and commercial mailing needs. Made in the UK from PEFC-certified sustainable paper, they combine security, convenience, and eco-responsibility.

## Description

Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use

## Features

- CONTENTS: Pack of 50 White Plain Mailing Envelopes | SIZE: C5 | LENGTH: 229 mm / 9.02 in | WIDTH: 164mm / 6.46 in | THICKNESS: 90 gsm | MADE in the UK
- ENHANCED SECURITY: These envelopes feature a blue high security pattern on the inside that scrambles text to ensure contents remain concealed when in-transit or storage. Send confidential documents with total confidence & peace of mind!
- HASSLE-FREE & PRACTICAL: The self-seal adhesive eliminates the need for any tape, glue or licking to seal these envelopes - just fold & press the top flap to secure shut! These envelopes are also compatible with most inkjet and laser printers.
- MULTIPURPOSE: These envelopes are ideal for mailing & organising invoices, letters, statements, catalogues, periodicals, brochures, etc. They are a cost-effective option for everyday home, office & commercial use!
- RECYCLABLE & PEFC CERTIFIED: Apart from being fully recyclable, these envelopes are made from paper sourced in a natural & controlled manner from SUSTAINABLY MANAGED FORESTS that also PROTECT THE RIGHTS OF WORKERS along the production process.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Triplast |
| Brand | Triplast |
| Model Number | ENPC50 |
| Product Dimensions | 22.9 x 16.4 x 0.1 cm; 380 g |
| Colour | White |
| Closure | Self-Seal |
| Shape | Rectangular |
| Material Type | Paper |
| Number of Items | 50 |
| Size | Plain - C5 (229x164mm) |
| Sheet Size | A5 |
| Manufacturer Part Number | ENPC50 |
| Item Weight | 380 g |

## Product Details

- **Brand:** Triplast
- **Colour:** White
- **Closure type:** Self-Seal
- **Occasion:** Anytime
- **Material:** Paper

## Images

![Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use - Image 1](https://m.media-amazon.com/images/I/61Kqct8QqFL.jpg)

## Available Options

This product comes in different **Size Name, Number Of Items** options.

## Frequently Bought Together

- Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use
- GP Globe Packaging 50 x C4 A4 White Plain Self Seal Paper Envelopes (Size: 324x229mm) - Printer Safe & Fully Opaque Security Envelopes - Business Mailing Envelopes for Office & Home Use
- NU: Multi-Purpose Printer Paper, White, 500 Sheets

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hk/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size](https://www.desertcart.hk/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size)

---

*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-20*