---
product_id: 312487959
title: "Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Yellow"
brand: "opticz"
price: "9.90 OMR"
currency: OMR
in_stock: true
reviews_count: 5
category: "Opticz"
url: https://www.desertcart.com.om/products/312487959-opticz-uv-blacklight-reactive-large-tip-invisible-ink-marker-yellow
store_origin: OM
region: Oman
---

# Bright yellow glow under UV blacklight Invisible in normal light for stealth marking 2x ink volume for extended use Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Yellow

**Brand:** opticz
**Price:** 9.90 OMR
**Availability:** ✅ In Stock

## Summary

> 🖤 Illuminate the unseen, own the night!

## Quick Answers

- **What is this?** Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Yellow by opticz
- **How much does it cost?** 9.90 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/312487959-opticz-uv-blacklight-reactive-large-tip-invisible-ink-marker-yellow)

## 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 & Skin-Friendly:** Non-toxic, fast-drying ink that’s safe for skin, enabling invisible body art and secure personal markings.
- • **Glow Like a Pro Under UV:** Ink remains invisible in daylight but bursts into bright yellow fluorescence under blacklight, perfect for exclusive events and security.
- • **Versatile Surface Compatibility:** Works seamlessly on metal, glass, plastics, paper, and more—ideal for creative and industrial applications alike.
- • **Double the Ink, Double the Impact:** Extra-large body with twice the ink of standard markers means longer sessions without interruption.
- • **Semi-Permanent & Smudge-Resistant:** Fast-drying, non-transferable ink ensures your markings stay put until you decide otherwise—no accidental erasures.

## Overview

The Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker delivers semi-permanent, invisible yellow ink that glows vibrantly under UV light. Featuring a broad tip and double the ink volume, it’s designed for extended use on diverse surfaces including skin, metal, and paper. Perfect for security marking, event management, and creative UV body art, this non-toxic, fast-drying marker ensures your messages stay hidden in daylight and shine bright when it counts.

## Description

Our Opticz brand UV blacklight reactive invisible ink markers use high quality semi permanent invisible ink. Perfect for identification marking, wall decoration, and other stealthy security uses. Glows an incredibly bright in blacklight! Perfect for metal, glass, plastics, paper. Safe for skin and body as well. Totally invisible, won't wash off, and is only visible under blacklight. These markers have a large body and wide tip. Great for shading in large areas and making larger marks than our standard fine tip markers. They also have 2x the amount of ink inside! These is the markers you want for semi permanent, invisible marking. These markers 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, Polystyrene, and Polyethylene. Fine tip for precision application. Ink is non-toxic, fast-drying and non-transferable. Prolonged exposure to sun light or continuous high powered UV exposure may cause fading over time.

Review: With the black light the ink showed up nice and bright for our Escape Room
Review: I bought this to help make UV geocaches. The ink works great, and I believe it works as intended, but it seems UV ink on paper can smear if it gets wet. Easy to use and read with a UV light.

## Features

- Invisible/colorless in normal light. Glows bright yellow in UV blacklight. Please note, these markers do NOT glow in the dark. You must have a blacklight to get the glow effects.
- Extra large body with braod tip. Contains twice the ink as our standard sized markers!
- Safe for use on skin. Use for security marking (such as admissions) or create amazing invisible body art designs that glow in blacklight!
- These is the markers you want for semi permanent invisible marking. These markers can be used for: Event Tickets, Industrial Coding, Security Printing, Coupons, Raffle Tickets, Inventory Control, Advertising, and more!
- Ink is fast drying and does not remove easily! Avoid sensitive area such as eyes, mouth, and nose.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07H2SHN76 |
| Best Sellers Rank | #39,427 in Office Products ( See Top 100 in Office Products ) #422 in Permanent Markers & Marker Pens |
| Brand | Opticz |
| Closure | Pull Cap |
| Color | Yellow |
| Customer Reviews | 4.3 4.3 out of 5 stars (591) |
| Date First Available | 27 March 2021 |
| Grip Type | Contoured |
| Ink Color | yellow |
| Item Weight | 10 g |
| Line Size | 1.0_1.9mm |
| Manufacturer | Opticz |
| Manufacturer Part Number | IIMARKERXLYOP |
| Material Type | Plastic |
| Model number | IIMARKERXLYOP |
| Number of Items | 1 |
| Point Type | Fine |
| Product Dimensions | 12.7 x 1.52 x 1.52 cm; 10 g |
| Size | 1 Count (Pack of 1) |
| Tip Type | metal |

## Product Details

- **Brand:** Opticz
- **Ink colour:** yellow
- **Number of Items:** 1
- **Point type:** Fine
- **Recommended uses for product:** Dark,Light

## Images

![Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Yellow - Image 1](https://m.media-amazon.com/images/I/51afbD3aDQL.jpg)

## Questions & Answers

**Q: will it work on glass liquor bottle?**
A: Yes, but recommend our blue or red color. They stick to glass better than the yellow. please allow 5-10 mins for the ink to fully dry after application.

**Q: Will it write completely invisible on the face of a playing card?**
A: Works best on porous surfaces. A very faint outline might be visible on a smooth glossy playing card.

**Q: So when you first wrote on paper did you have to wait until it dried to be completely invisible or right out the gate it was invisible?**
A: Yes - It's best if you wait, but it doesn't take long. The ink definitely shows up better once it is dry. Sometimes it's visible after it dries, depending on whether you use cardstock or regular paper. Regardless, it is one of the better pens that I've found to use.

**Q: Will the ink wash out of sheets if laundered in bleach and industrial strength chemicals? Hotel sheets, per se?**
A: It will not. This is security ink and is formulated to stick and be very tough to remove.

Sorry

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 28 April 2025*

With the black light the ink showed up nice and bright for our Escape Room

### ⭐⭐⭐⭐⭐ Review
*by D***L on 1 June 2025*

I bought this to help make UV geocaches. The ink works great, and I believe it works as intended, but it seems UV ink on paper can smear if it gets wet. Easy to use and read with a UV light.

### ⭐⭐⭐⭐⭐ Review
*by S***T on 1 March 2026*

Used this in a student project with our robotics class to create an “escape room”. We used it on a blackboard in a dark area, with some text written in chalk and the other text with this pen. It worked great.

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**Shop now:** [https://www.desertcart.com.om/products/312487959-opticz-uv-blacklight-reactive-large-tip-invisible-ink-marker-yellow](https://www.desertcart.com.om/products/312487959-opticz-uv-blacklight-reactive-large-tip-invisible-ink-marker-yellow)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-03-13*