---
product_id: 34183223
title: "UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue"
brand: "opticz"
price: "R$174"
currency: BRL
in_stock: true
reviews_count: 13
category: "Opticz"
url: https://www.desertcart.com.br/products/34183223-uv-blacklight-reactive-large-tip-invisible-ink-marker-blue
store_origin: BR
region: Brazil
---

# Twice the ink volume for extended use Bright blue glow under UV blacklight Extra large broad tip for bold strokes UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue

**Brand:** opticz
**Price:** R$174
**Availability:** ✅ In Stock

## Summary

> 🔦 Illuminate your secrets with invisible brilliance!

## Quick Answers

- **What is this?** UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue by opticz
- **How much does it cost?** R$174 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/34183223-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 & Skin-Friendly:** Formulated for safe use on skin, perfect for invisible body art that glows at your next event or party.
- • **Versatile UV Activation:** Perfect for security printing, advertising, raffle tickets, and creative projects that demand a secret glow.
- • **Fast-Drying & Semi-Permanent:** Ink dries quickly and resists easy removal, ideal for security marking, event tickets, and inventory control.
- • **Double the Ink, Double the Impact:** Extra large body holds twice the ink of standard markers, ensuring long-lasting creativity without interruptions.
- • **Invisible by Day, Vibrant by Night:** Write secret messages or create stunning invisible art that only reveals itself under UV light.

## Overview

The Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker features a broad tip and double ink capacity for bold, long-lasting invisible markings that glow bright blue under UV blacklight. Safe for skin and fast-drying, it’s perfect for security, creative art, and event applications where secret messages or markings need to shine under blacklight.

## Description

Shop Opticz at the desertcart Arts, Crafts & Sewing store. Free Shipping on eligible items. Save on everyday low prices.

Review: Fun way to use. - Best black light invisible marker I’ve bought shows up so clean in the black light. Easy to use dried quickly very high-quality. The one I got glows blue in black light. Very good if you want to write an invisible note, secret letter or even write in your diary/journal.
Review: Good Marker - Drew all over my walls in my house and my girlfriend loves it. Very bright and bold lighting. The tip started to fade after I was done drawing but I put the pen down for a while and it came back with full color!

## Features

- Invisible/colorless in normal light. Glows bright blue 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 broad 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 are 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 | B01F6IPK00 |
| Best Sellers Rank | #19,786 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #319 in Drawing Markers |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,172) |
| Date First Available | May 5, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.352 ounces |
| Item model number | RSMARKB |
| Manufacturer | DIRECTGLOW LLC |
| Product Dimensions | 5.25 x 0.5 x 0.5 inches |

## Product Details

- **Brand:** Opticz
- **Ink Color:** Blue
- **Number of Items:** 1
- **Point Type:** Medium
- **Recommended Uses For Product:** Ultraviolet security, mark personal belongings, glow party, secret messages, drawing, UV art

## Images

![UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue - Image 1](https://m.media-amazon.com/images/I/51YhPUrxVSL.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

### ⭐⭐⭐⭐⭐ Fun way to use.
*by K***E on February 6, 2026*

Best black light invisible marker I’ve bought shows up so clean in the black light. Easy to use dried quickly very high-quality. The one I got glows blue in black light. Very good if you want to write an invisible note, secret letter or even write in your diary/journal.

### ⭐⭐⭐⭐⭐ Good Marker
*by N***H on January 20, 2026*

Drew all over my walls in my house and my girlfriend loves it. Very bright and bold lighting. The tip started to fade after I was done drawing but I put the pen down for a while and it came back with full color!

### ⭐⭐⭐⭐ Works ok, except on bright white paper
*by M***I on August 19, 2019*

Works ok, except on bright white paper, the brighteners in the paper (or other materials) mask the glow from this blue pen, use red on bright white paper, or other media.

## Frequently Bought Together

- Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Blue
- Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Red
- Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Yellow

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**Shop now:** [https://www.desertcart.com.br/products/34183223-uv-blacklight-reactive-large-tip-invisible-ink-marker-blue](https://www.desertcart.com.br/products/34183223-uv-blacklight-reactive-large-tip-invisible-ink-marker-blue)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-03-04*