What would this look like on black fabric?

The ink will still glow in UV light on any surface. The exact appearance would depend on how absorbent the fabric is.

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

If you mark the underside of the table so that it is not exposed to sunlight or rain, it should work fine.

Can you use if in a fountain pen?

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.

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

385-390NM. Fluorescent black light works the best.

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Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (4 Ounce Bottle)

Product ID: 3620920

Details

Brand
Opticz
Item Volume
118 ml
Manufacturer
Opticz
Package Information
Bottle
Paint Type
Alcohol

💡Bright blue glow under UV

🔵Invisible in normal light

⏱️Fast drying alcohol-based ink

A$33

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔵 Illuminate the unseen, secure with style!

SIZE YOUR NEEDS - Available in 5 sizes from 2oz to 32oz with quantity discounts—stock up and save!
FAST SAFE FORMULA - Non-toxic, alcohol-based ink dries quickly for hassle-free application.
GLOW UP YOUR SECURITY - Perfect for marking valuables, admissions, and event stamping with a UV-reactive punch.
STEALTH MODE ACTIVATED - Invisible ink that stays hidden until UV light reveals its vibrant blue glow.
TRUSTED BRAND ASSURANCE - Opticz quality you can rely on, with a full range of UV inks and blacklights to elevate your creative projects.

Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink is a fast-drying, alcohol-based ink that remains invisible under normal light but glows bright blue under UV blacklight. Available in multiple sizes with quantity discounts, it’s ideal for security marking, event stamping, and creative projects. Non-toxic and trusted by professionals, this ink offers a discreet yet powerful way to protect and personalize valuables.

Specifications

ASIN	B00TOWZA82
Best Sellers Rank	#58,573 in Office Products ( See Top 100 in Office Products ) #86 in Bottled Pen Ink
Brand Name	Opticz
Container Type	Bottle
Customer Reviews	4.2 4.2 out of 5 stars (1,081)
Ink Color	Blue
Manufacturer	Opticz
Manufacturer Part Number	DGINK4OZB
Number of Items	1
Paint Type	Alcohol
UPC	011110914613 722301711606
Volume	118 ml

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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