---
product_id: 3620920
title: "Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle)"
brand: "opticz"
price: "¥3736"
currency: JPY
in_stock: true
reviews_count: 10
category: "Opticz"
url: https://www.desertcart.jp/products/3620920-opticz-all-purpose-invisible-blue-uv-blacklight-reactive-security-ink
store_origin: JP
region: Japan
---

# Fast-drying, alcohol-based formula Available in 5 scalable sizes (2oz to 32oz) Invisible in daylight, glows bright blue under UV Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle)

**Brand:** opticz
**Price:** ¥3736
**Availability:** ✅ In Stock

## Summary

> 🔵 Illuminate the unseen, own the night!

## Quick Answers

- **What is this?** Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle) by opticz
- **How much does it cost?** ¥3736 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/3620920-opticz-all-purpose-invisible-blue-uv-blacklight-reactive-security-ink)

## Best For

- opticz enthusiasts

## Why This Product

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

## Key Features

- • **Safe & Trusted:** Non-toxic, skin-safe when used as directed, and backed by the reputable Opticz brand.
- • **Glow-Up Guaranteed:** Vibrant blue fluorescence that pops brilliantly at parties, events, or security checks.
- • **Speedy Drying Power:** Alcohol-based formula dries quickly, making stamping and marking hassle-free and efficient.
- • **Stealth Mode Activated:** Invisible ink that only reveals itself under UV blacklight—perfect for secure marking and secret messages.
- • **Versatile Volume Options:** Choose from 2oz to 32oz bottles to fit your project size and budget with quantity discounts.

## Overview

Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink is a fast-drying, alcohol-based ink that remains invisible in normal light but glows bright blue under UV blacklight. Available in multiple sizes from 2oz to 32oz, it’s ideal for secure marking, glow parties, and creative projects. Non-toxic and skin-safe, this trusted Opticz ink delivers vibrant, reliable fluorescence for professionals and creatives alike.

## Description

desertcart.com : Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle) : Party Favors : Office Products

Review: This stuff is excellent- but truly an ink, not a paint. - This product is easy to use and looks great under a black light. I've painted plastic, metal, fabric, paper and resin with minimal issues. I found that painting over fabric is particularly successful, and white is best. I was glad that I read the reviews that indicated that while this works well- it is very thin. On occasion, you do need a few coats to really pop- particularly if the object isn't stark white. This didn't show up on anything I painted in normal light- and is very much invisible until revealed by blacklight. This is exactly the answer to what I was looking for, for personal projects. I would buy again.
Review: Awesome - It works very well. Completely clear without a blacklight. No issues with skin. Used it on face, neck and arms. Lasted all night of dancing amd probably more.

## Features

- Invisible in regular light, glows bright blue in blacklight. The colors really pop in ultraviolet light but are undetectable in normal light.
- Choose between 5 sizes discounted by quantity. 2oz, 4oz, 8oz, 16oz and 32oz.
- Ideal for glow parties, hand stamping, marking valuables, admissions, and much more!
- Safe and non toxic when used as directed. Alcohol based and fast drying. Ideal for stamp pads and rubber stamps. NOT FOR PRINTERS OR TATTOOS.
- Trusted Opticz Brand. We also carry a full line of invisible UV ink marker, uv blacklights and daytime visible inks. Click on our brand name OPTICZ to see our entire selection in our storefront!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005X8PKBI |
| Best Sellers Rank | #38,860 in Office Products ( See Top 100 in Office Products ) #40 in Bottled Pen Ink |
| Brand | Opticz |
| Closure | Screw Off Cap |
| Color | Blue |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,059) |
| Date First Available | February 27, 2010 |
| Grip Type | Smooth |
| Ink Color | Blue |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.39 ounces |
| Item model number | DGINK2OZB |
| Line Size | 2mm_and_above |
| Manufacturer | Opticz |
| Manufacturer Part Number | DGINK2OZB |
| Material Type | Liquid |
| Number of Items | 1 |
| Package Dimensions | 4.02 x 1.3 x 1.26 inches |
| Pencil Lead Degree (Hardness) | Hard |
| Point Type | Broad |
| Size | 2 fl oz |

## Product Details

- **Brand:** Opticz
- **Global Trade Identification Number:** 00595013905461
- **Item Volume:** 2 Fluid Ounces
- **Package Information:** Bottle
- **Paint Type:** Alcohol

## Images

![Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle) - Image 1](https://m.media-amazon.com/images/I/61p1NYcbmuL.jpg)
![Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle) - Image 2](https://m.media-amazon.com/images/I/619LWBGRsJL.jpg)
![Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle) - Image 3](https://m.media-amazon.com/images/I/61mPG3D0YEL.jpg)
![Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle) - Image 4](https://m.media-amazon.com/images/I/61MsJMJZdIL.jpg)
![Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle) - Image 5](https://m.media-amazon.com/images/I/6177J7hXIwL.jpg)

## Available Options

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

## Questions & Answers

**Q: What would this look like on black fabric?**
A: The ink will still glow in UV light on any surface. The exact appearance would depend on how absorbent the fabric is.

**Q: I live in a high crime town,i have lost 5 tables from the front porch,looking for a invisable long lasting ink/marking method so if cops can identify**
A: If you mark the underside of the table so that it is not exposed to sunlight or rain, it should work fine.

**Q: Can you use if in a fountain pen?**
A: Would not be ideal for this purpose. Fountain pen ink is typically water based. Our inks are alcohol based and much thinner than a water based ink. They can work well with calligraphy pens in some cases, but an alcohol based ink would not mesh well with the internal parts of a fountain pen.

**Q: What wavelength (nm?) of black light is the ink most sensitive to?  i want to purchase some uv leds and want the brightest florescence i can get.  thx**
A: 385-390NM. Fluorescent black light works the best.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This stuff is excellent- but truly an ink, not a paint.
*by A***R on October 21, 2022*

This product is easy to use and looks great under a black light. I've painted plastic, metal, fabric, paper and resin with minimal issues. I found that painting over fabric is particularly successful, and white is best. I was glad that I read the reviews that indicated that while this works well- it is very thin. On occasion, you do need a few coats to really pop- particularly if the object isn't stark white. This didn't show up on anything I painted in normal light- and is very much invisible until revealed by blacklight. This is exactly the answer to what I was looking for, for personal projects. I would buy again.

### ⭐⭐⭐⭐⭐ Awesome
*by R***Z on June 17, 2025*

It works very well. Completely clear without a blacklight. No issues with skin. Used it on face, neck and arms. Lasted all night of dancing amd probably more.

### ⭐⭐⭐⭐⭐ Chemicles last a whi
*by J***N on January 4, 2026*

Useful

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-23*