---
product_id: 127390256
title: "500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window)"
brand: "spark ink"
price: "₹ 4420"
currency: INR
in_stock: false
reviews_count: 8
url: https://www.desertcart.in/products/127390256-500-count-security-envelopes-no-10-self-seal-plain-standard
store_origin: IN
region: India
---

# Eco-friendly 24 lb paper from sustainable forests Standard No.10 size 4-1/8 x 9-1/2 inches Tamper-evident security slits 500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window)

**Brand:** spark ink
**Price:** ₹ 4420
**Availability:** ❌ Out of Stock

## Summary

> 🛡️ Seal your secrets with style and security!

## Quick Answers

- **What is this?** 500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window) by spark ink
- **How much does it cost?** ₹ 4420 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/127390256-500-count-security-envelopes-no-10-self-seal-plain-standard)

## Best For

- spark ink enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Sealing:** Self-stick peel & seal closure saves time and guarantees a secure seal.
- • **Tamper-Proof Design:** Exclusive tear-open slits prevent resealing and unauthorized access.
- • **Eco-Conscious Choice:** Made with wind power and recyclable materials for a greener office.
- • **Privacy You Can Trust:** Dark navy security tint ensures confidential mail stays confidential.
- • **Versatile & Professional:** Plain, windowless design perfect for check printing and bulk mailing.

## Overview

These 500-count No.10 security envelopes feature heavyweight 24 lb paper with a dark navy security tint and tamper-evident slits to protect sensitive documents. Self-seal peel & stick closures provide quick, reliable sealing. The plain, windowless design is ideal for professional mailing and check printing. Manufactured sustainably in the USA using wind power, these envelopes combine privacy, convenience, and eco-consciousness.

## Description

Full description not available

## Features

- Heavyweight Security Envelopes No. 10 (non-window): We specifically designed these #10 envelopes with a dark navy, heavy coverage security tint to provide guaranteed privacy for your legal or business mail. Crafted with thick, 24lb paper that ensures upmost privacy.
- Never Get Fooled Again: Unlike, regular plain white envelopes, these no 10 envelopes tear when opened! Exclusive tamper evident slits provide increased security to prevent careful opening and resealing.
- Perfect for Check Printing or Sensitive Documents: Windowless blank design allows for easy address printing or labels for mass mailing or to simply keep a bulk supply on hand for your home office. These white no-lick self-seal envelopes are used by businesses to mail documents with sensitive materials.
- Environmentally Friendly: Rest easy when you send a letter. Our legal size envelopes are manufactured from well managed forests and are fully recyclable.
- Eco-friendly created with wind power in the USA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Spark Ink |
| Brand | Spark Ink |
| Item Weight | 6.34 pounds |
| Product Dimensions | 9.5 x 4.13 x 0.04 inches |
| Item model number | SPI-SEE-ENV-PARENT |
| Color | White |
| Closure | Self-Seal |
| Shape | Rectangular |
| Material Type | 24 LB Paper |
| Number of Items | 500 |
| Size | 4 1/8” x 9 1/2” |
| Sheet Size | 4 1/8” x 9 1/2” Inches |
| Manufacturer Part Number | SPI-SEE-ENV-PARENT |

## Product Details

- **Brand:** Spark Ink
- **Color:** White
- **Closure Type:** Self-Seal
- **Material:** 24 LB Paper
- **Number of Items:** 500

## Images

![500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window) - Image 1](https://m.media-amazon.com/images/I/61loKtSfUJS.jpg)
![500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window) - Image 2](https://m.media-amazon.com/images/I/61c9jUGjw7L.jpg)
![500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window) - Image 3](https://m.media-amazon.com/images/I/51xJfGlO0kS.jpg)
![500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window) - Image 4](https://m.media-amazon.com/images/I/61O35G437uS.jpg)
![500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window) - Image 5](https://m.media-amazon.com/images/I/61ReIPvMv-L.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ "Tamper-Proof" perforations can easily be defeated.  Good quality envelopes, though.
*by R***Y on March 1, 2020*

I have only used about 20 envelopes of this lot so far. It takes me about a year to use 500 envelopes. No serious disappointments yet in the first 20. The self-seal adhesive is a thin line but is amazingly strong. I only did a quick random inspection upon delivery to evaluate integrity of about 15 of them and in that inspection, the other glued seams and flaps appear well placed and securely glued. These don't feel exactly like 24 pound paper but they do certainly feel thicker than 20 pound printer paper. I did discover that when wetted slightly by a light rain during the time it took to transfer an envelope from hand to mailbox, the security print showed through. Uh-oh. I thought this was a reason to ding down a star in the review Nope. To test, I wetted a couple of Columbian (Mead) #10 Grip-Seal Security envelopes and the tint showed through on them just as much as these Spark-Ink branded envelopes. I only gave 4 stars because I just don't like to give 5 stars to anything. It just seems facetious. There is only one thing--that I'm not entirely sold on--and that is the "security" perforation scheme on the flap that is designed to show that the envelope has been tampered with. I would rather that be eliminated. I think that those diagonal slits weaken the flap and to tell you the truth, using a hair dryer to heat the flap, you can open and close it and no one would be the wiser. You can heat most any pressure sensitive adhesive to weaken it. I guess that wet-glue envelopes show tampering more readily because the paper wilts and deforms with the application of steam. (I wish we could just put a dye bomb in the envelope or something (ha-ha).)

### ⭐⭐⭐⭐⭐ Really stick, surprising quality all around
*by S***Y on February 6, 2021*

To my surprise these really were worth the wait. If you can afford the higher price, it's a no brainer. I haven't seen better. I'm picky about my business envelopes, been through so many different kinds. These deliver.-They STICK. That's my #1 concern. Most others barely seal if it all.-Good paper weight. Not cheap thin paper.-Security works, hides sensitive info-Sliced flap works, they are actually a pain to open.-The inside corners behind the flap aren't flimsy/open and don't catch the paper you're trying to insert.I actually waited a month on backorder to get these in hopes I'd finally found a good envelope again after the last maker I used to buy cheaped out on "new and improved".

### ⭐⭐⭐⭐⭐ This is the business envelope you need!
*by S***L on September 4, 2020*

This envelope is the perfect thickness and provides great security for payment/mail that is being sent. The envelopes come in a heavy cardboard box so they arrived in perfect condition and are able to be stored/stacked easily. The adhesive is strong and sticks very well, These envelopes also have security tamper evident slits so if anyone attempted to open it the receiver would know. I am very pleased with these envelopes and will order again! Great product & shipped very well! Better than I get from local office supply and a better value!

## Frequently Bought Together

- Spark Ink 500 Count Security Envelopes No.10, Self-Seal, Plain Standard Size Business Envelopes 4-1/8 x 9-1/2 Inch, Self Stick Blank White Envelopes, Peel & Seal, Quality 24 lb Paper (Non-Window)
- Amazon Basics Multipurpose Copy Printer Paper, 20 lb, 92 Bright, 8.5" x 11", White, 8 Reams, 4000 Sheets (500 Sheets/Ream)
- Ampad Fastrip Security Catalog Envelope, 9 Inch x 12 Inch, Peel & Seal Adhesive, Security Tint, Tear-Away Quick-Open Strip, White, 100 Per Box (73127)

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*Product available on Desertcart India*
*Store origin: IN*
*Last updated: 2026-05-26*