Search  for anything...
Opticz

Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Red

Based on 435 reviews
Condition: New
Checking for the best price...
$11.89
Holiday Deal was $11.99

Buy Now, Pay Later

As low as $2 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Directglow
Arrives Wednesday, Nov 18
Order within 1 hour and 15 seconds

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

Recently Viewed

At a glance

Condition
New
Dimensions
5.2 x 0.51 x 0.51 in
Color
red
Material
Plastic
Point Type
Medium
Target Audience
Adult
Marker Type
Permanent Marker
In the box
1 marker

Features 5

  • Invisible/colorless in normal light. Glows bright red 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!

Description

This UV blacklight reactive invisible red large tip marker uses our high quality water based invisible ink blend. Perfect for secret messages, marking merchandise, and other stealthy security uses. Glows an incredible bright red in blacklight. Ideal for metal, glass, plastics or paper. Can also be used on aluminum, ABS, acrylic, rubber, cellulose, acetate, formica, nylon, polystyrene and polyethylene. Totally invisible and won't wash off easily. Large tip is ideal for covering larger areas with minimum passes. Marker comes ready to use and is formulated to fluoresce brightly under long wave ultraviolet or LED blacklight. Ink is non-toxic, fast-drying and non-transferable. Ideal for applying onto an already printed surface. Marker is non refillable. This marker is suited for re-admittance at events, social gatherings, sporting events, glow parties, marking valuables or your own unique security applications where hidden detection is of benefit. Our inks are non-toxic when used properly, fast-drying and non-transferable. This ink can be used for textile marking, hand-stamping, and fabrics as well. If using on skin, avoid application around sensitive areas like eyes and mouth.

Specs 32

Brand Opticz
Ink Color Red
Number of Items 1
Point Type Medium
Recommended Uses For Product Glow Party, Secret Messages, Security
Brand Name Opticz
Target Audience Adult
UPC 840015102548

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

Find out more information about your sheets are!!
This item is going when you want to find out how often your sheets are changed, I loved it, it is easy to dry, visibility is 0, and easy to use
Reviewed in the United States on October 11, 2025 by Love With Paws
Actually glows under blacklight
Review Image by Ac
Review Image by Ac
Review Image by Ac
Review Image by Ac
It's hard to find a marker that visibly glows under blacklight. This one worked well enough though Color quality: great
Reviewed in the United States on July 2, 2025 by Ac
Good UV marker
This marker works well, but it does show up, without UV light, so be discrete in how you mark property, and they might not notice. The markings appear to be glossy, without UV light.
Reviewed in the United States on February 13, 2019 by Amazon Customer
Perfect for creating escape room games!
Opticz UV Blacklight Reactive Large Tip Invisible Ink Marker, Red, shows up well in the UV light. I wrote a clue onto a paper with this marker and then laminated the paper. The marker showed up just as well after laminating! Also available in other colors.
Reviewed in the United States on April 24, 2021 by Delta High School Library
Bright red under UV light
Just what I needed. It is invisible in normal daylight and really bright red when I shine the 30 watt UV flashlight on it.
Reviewed in the United States on November 3, 2023 by Utah Dad
An UV pen that will fade under UV light.
Review Image by Orcatrainer
Review Image by Orcatrainer
Review Image by Orcatrainer
This was purchased to place some invisible mark on my items before to sell them, to avoid those "return scams". Unfortunately, I found out that not only the writing isn't really invisible, but you could still see it under a regular light source, but the irony was that this is an UV pen that will fade away slowly when exposed under UV light. Otherwise it's fun to use as long as it last. ... show more
Reviewed in the United States on May 24, 2025 by Orcatrainer
Dries invisible and easy to see with Black light
I was hosting an event and I wanted to have a game where a black light was needed to reveal clues on various envelopes. I was able to use this and it worked perfectly. Once the envelopes dried you couldn't see anything without the black light. It was perfect.
Reviewed in the United States on July 27, 2020 by D'Guerra
Don’t waste your time.
The tip on this pen is way too soft, needed to use as a marking device for equipment, but the tip didn’t hold shape and anything you try and write ends up just a huge mess and unreadable.
Reviewed in the United States on February 16, 2021 by Sandwolf
How it works
Checking for best price...