---
product_id: 4940493
title: "ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen"
brand: "asr tactical"
price: "¥2918"
currency: JPY
in_stock: true
reviews_count: 8
category: "Asr Tactical"
url: https://www.desertcart.jp/products/4940493-asr-tactical-invisible-ink-pen-secret-formula-disappearing-blue-gel
store_origin: JP
region: Japan
---

# Fades completely in ~1 hour Fine 0.5mm blue gel ink Writes up to 2500 feet ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen

**Brand:** asr tactical
**Price:** ¥2918
**Availability:** ✅ In Stock

## Summary

> 🕵️‍♂️ Write it. Watch it vanish. Own the secret.

## Quick Answers

- **What is this?** ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen by asr tactical
- **How much does it cost?** ¥2918 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/4940493-asr-tactical-invisible-ink-pen-secret-formula-disappearing-blue-gel)

## Best For

- asr tactical enthusiasts

## Why This Product

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

## Key Features

- • **Endurance Writing:** Write up to 2500 feet with smooth, fine-point gel ink that feels like your everyday pen but with a covert twist.
- • **Disappear in Style:** Ink looks normal for 15 minutes, then vanishes within an hour—perfect for confidential notes or playful secrets.
- • **Sleek & Unassuming:** Classic clear barrel and snap closure make it indistinguishable from any regular pen—blend in while standing out.
- • **Cold War Secret Tech:** Developed from a Cold War formula, this pen brings espionage-grade stealth to your desk.
- • **Limitless Fun & Function:** Ideal for magicians, pranksters, and professionals who crave privacy—just don’t use on legal docs!

## Overview

The ASR Tactical Invisible Ink Pen features a fine 0.5mm blue gel ink that appears normal for 15 minutes before fading completely within an hour. With a writing capacity of up to 2500 feet, this pen combines Cold War-era disappearing ink technology with a sleek, unmarked design, making it perfect for confidential notes, magic tricks, or playful messages. Note: Not suitable for legal or financial documents.

## Description

Need to leave a note for someone, but don't want to them to be able to show anyone else? The disappearing ink pen will allow you to do just that.This special formula was developed during the Cold War and is now encapsulated within the discreet gel pen for general use. Once on the paper, the ink will appear normally for about 15 minutes. Within an hour, the message will have completely vanished and will be unrecoverable; even with ultraviolet light.Note: deconstruction time of the ink will vary depending on ambient conditions.

Review: Amazing pen, I went To Vegas and took out ... - Amazing pen, I went To Vegas and took out a huge loan with the casino, I used this pen to sign the loan and now I'm debt free. Don't feel to bad for the casino though folks, I lost it all trying to double it up on black in roulette.
Review: Writes poorly - First pen did not write at all unless tapped on desk several times, and then only for about one inch of writing before needing to tap it again several times. Replacement pen better, but still not like a regular pen. Must hold it vertically and write slowly or ink will skip. Very awkward to use but the ink does disappear within a few hours.

## Features

- WATCH THE VIDEO: Once on paper, the ink appears fully legible and undiscernable from a normal pen for 15 minutes but slowly starts to disappear; fading within 20-30 minutes; completely after about an hour
- REALLY WORKS: Looks like a real pen with no markings to distinquish it otherwise. Nine out of ten times, you might pick this pen out of a cup of many; it looks like a pen you would want to use; Magicians, spys and secrects oh my
- WRITING CAPACITY: Invisible formula ball point pen will write up to 2500 feet before running out of ink; lots of use and entertainment for all ages
- SPECIFICATIONS: Fine Point; Size: 0.5mm; Ink Color: Blue; Pen Case: Clear
- WARNING: Do not use on any legal document or financial instrument

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0036QU40Q |
| Brand | ASR Tactical |
| Closure | Snap |
| Color | Blue |
| Customer Reviews | 3.2 3.2 out of 5 stars (28) |
| Date First Available | February 1, 2010 |
| Grip Type | smooth |
| Ink Color | Blue |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.16 ounces |
| Item model number | KGBDIP-647 |
| Line Size | 0.5mm Millimeters |
| Manufacturer | ASR Tactical |
| Manufacturer Part Number | KGBDIP-647 |
| Material Type | Plastic |
| Number of Items | 1 |
| Point Type | Fine |
| Product Dimensions | 6 x 0.5 x 0.5 inches |
| Size | 1 Count (Pack of 1) |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** ASR Tactical
- **Color:** Blue
- **Ink Color:** Blue
- **Writing Instrument Form:** Ballpoint Pen

## Images

![ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen - Image 1](https://m.media-amazon.com/images/I/51oosoYfO2L.jpg)
![ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen - Image 2](https://m.media-amazon.com/images/I/71TYcZnvvVL.jpg)
![ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen - Image 3](https://m.media-amazon.com/images/I/41Q2X8C9vSL.jpg)
![ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen - Image 4](https://m.media-amazon.com/images/I/51chMFEfAJL.jpg)
![ASR Tactical Invisible Ink Pen Secret Formula Disappearing Blue Gel Ink Pen - Image 5](https://m.media-amazon.com/images/I/51w42VYpYyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing pen, I went To Vegas and took out ...
*by A***W on September 6, 2014*

Amazing pen, I went To Vegas and took out a huge loan with the casino, I used this pen to sign the loan and now I'm debt free. Don't feel to bad for the casino though folks, I lost it all trying to double it up on black in roulette.

### ⭐⭐ Writes poorly
*by J***N on July 4, 2015*

First pen did not write at all unless tapped on desk several times, and then only for about one inch of writing before needing to tap it again several times. Replacement pen better, but still not like a regular pen. Must hold it vertically and write slowly or ink will skip. Very awkward to use but the ink does disappear within a few hours.

### ⭐⭐⭐⭐⭐ Five Stars
*by D***S on July 28, 2015*

This is a gre

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-05*