---
product_id: 240505437
title: "Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue"
brand: "opticz"
price: "€ 48.57"
currency: EUR
in_stock: true
reviews_count: 5
category: "Opticz"
url: https://www.desertcart.gr/products/240505437-opticz-uv-blacklight-reactive-large-tip-invisible-ink-marker-blue
store_origin: GR
region: Greece
---

# Waterproof & solvent-based for lasting durability Bright blue UV-reactive ink, invisible until blacklight Large 1.9mm chisel tip for bold, precise marks Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue

**Brand:** opticz
**Price:** € 48.57
**Availability:** ✅ In Stock

## Summary

> 🔦 Illuminate the Invisible — Mark with Confidence!

## Quick Answers

- **What is this?** Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue by opticz
- **How much does it cost?** € 48.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/240505437-opticz-uv-blacklight-reactive-large-tip-invisible-ink-marker-blue)

## 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 & Ready to Use:** Non-toxic formula designed for professional use (not for skin), ink flows instantly out of the pen.
- • **Permanent & Waterproof:** Solvent-based ink ensures your markings won’t wash off or fade, even in tough conditions.
- • **Bold & Easy Application:** Industrial large tip delivers smooth, fast-drying, non-transferable marks every time.
- • **Stealthy Security Marking:** Invisible ink only visible under UV blacklight—perfect for secure ID and event tickets.
- • **Versatile Surface Compatibility:** Works flawlessly on metal, glass, plastics, paper, and more for multi-surface use.

## Overview

The Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker features a bold 1.9mm chisel tip and bright blue UV-reactive ink that remains invisible to the naked eye but glows vividly under blacklight. Waterproof and solvent-based, this permanent marker is ideal for secure identification, event tickets, and multi-surface applications including metal, glass, and plastics. Fast-drying and non-transferable, it’s designed for professional, stealthy marking needs.

## Description

This UV blacklight reactive blue invisible ink large tip marker/pen uses high quality permanent invisible ink. Perfect for identification marking, wall decoration and other stealthy security uses. Glows an incredible bright blue. Perfect for metal, glass, plastics & paper, etc. Totally invisible, won't wash off, and is only visible under blacklight. This is the pen you want for permanent, invisible marking. Solvent based and not recommended for use on skin. This pen can be used for: event tickets, industrial coding, security printing, coupons, raffle tickets, inventory control, advertising and more! Can also be used on: Aluminum, ABS, acrylic, rubber, cellulose, acetate, formica, nylon, polystryrene and polyethylene normal. Color: Invisible/colorless UV blacklight activated. Color: Bright blue. Tip: Industrial large tip waterproof & easy to handle, ink comes ready to use and is formulated to fluoresce brightly under longwave ultraviolet lamps. Ink is non-toxic, fast-drying and non-transferable. Ideal for applying onto an already printed surface. Solvent base. 5.25" long (bottom to tip of cap) by 1/2" diameter.

Review: Perfect
Review: Works as Advertised

## Features

- Large tip marker
- Water based
- or identification marking, wall decoration and other stealthy security uses. Glows an incredible bright blue. Perfect for metal, glass, plastics & paper, etc. Totally invisible, won't wash off, and is

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01F6IPK00 |
| Best Sellers Rank | #62,356 in Office Products ( See Top 100 in Office Products ) #594 in Permanent Markers & Marker Pens |
| Body Shape | Round |
| Brand | Opticz |
| Brand Name | Opticz |
| Colour | Blue |
| Customer Reviews | 4.4 out of 5 stars 1,123 Reviews |
| Global Trade Identification Number | 00840015102531 |
| Hand Orientation | Ambidextrous |
| Ink Base | Alcohol |
| Ink Colour | Blue |
| Is Waterproof | true |
| Item Dimensions | 13.3 x 1.3 x 1.3 Centimeters |
| Line Size | 1_0_1_9mm |
| Manufacturer | Opticz |
| Marker Type | Permanent Marker |
| Material Type | Plastic |
| Model number | RSMARKB |
| Number Of Items | 1 |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Pattern | Letter Print |
| Point Type | Large |
| Recommended Uses For Product | Uv |
| Special Features | Waterproof |
| Style Name | Chisel |
| Subject Character | [BLANK] |
| Surface Recommendation | Glass,Metal,Wall |
| Target Audience | Adult, Kid |
| Theme | Invisible Ink Marking |
| UPC | 840015102531 |
| Unit Count | 1.0 Count |
| Warranty Description | no warranty available |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Opticz
- **Ink Colour:** Blue
- **Number of Items:** 1
- **Point Type:** Large
- **Recommended Uses For Product:** Uv

## Images

![Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue - Image 1](https://m.media-amazon.com/images/I/51YhPUrxVSL.jpg)
![Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue - Image 2](https://m.media-amazon.com/images/I/613At-0K-dL.jpg)

## Questions & Answers

**Q: The "product description" says the ink is permanent and solvent based. However "features & details" says water based. Which is correct?**
A: Ok, I just double checked this.  It is a 60% water based ink, but it is permanent and water does not remove it.  We just verified with testing.

**Q: How long does this last?**
A: We bought it a year ago. With cap on, lasts. We just used it again ast week. As for what you've written, unless it suffers wear and tear, it lasts. Stuff penned last year still shows.

**Q: Does it come with a uv light? Once you have written on paper or other surface how long does the message last?**
A: No Uv light. Stays on paper or surface as long as you don't wash it off.

**Q: Quiero solo ordenar un set de 3 y me están cobrando ppr 3 set**
A: Agrege uno y luego cambie la cantidad.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect
*by A***E on 2 December 2025*



### ⭐⭐⭐⭐⭐ Works as Advertised
*by J***R on 18 March 2024*



### ⭐⭐⭐⭐⭐ OPTICZ UV INVISABLE INK PEN
*by P***Y on 23 February 2026*



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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-11*