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 (2 Ounce Bottle)

Opticz All Purpose Invisible Blue UV Blacklight Reactive Security Ink (2 Ounce Bottle)

Product ID: 3620920

Details

Brand
Opticz
Global Trade Identification Number
Item Volume
2 Fluid Ounces
Package Information
Bottle
Paint Type
Alcohol

💡Bright blue glow under UV

🔵Invisible in normal light

⏱️Fast drying alcohol-based ink

Description

🔵 Illuminate the unseen, secure the scene!

FAST SAFE FORMULA - Alcohol-based, quick-drying, and non-toxic for worry-free use in professional settings.
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.
FLEXIBLE SIZING OPTIONS - Available in 2oz to 32oz bottles—scale your needs without breaking the bank.
TRUSTED BRAND ASSURANCE - Opticz quality you can rely on, with a full lineup of UV inks and blacklights to elevate your toolkit.

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 light. Available in multiple sizes from 2oz to 32oz, it’s ideal for secure marking, event stamping, and creative applications. Non-toxic and trusted by professionals, this ink offers a reliable, stealthy solution for security and entertainment needs.

Specifications

ASIN	B005X8PKBI
Best Sellers Rank	#143,983 in Office Products ( See Top 100 in Office Products ) #216 in Bottled Pen Ink
Brand Name	Opticz
Container Type	Bottle
Customer Reviews	4.2 4.2 out of 5 stars (1,069)
Global Trade Identification Number	00595013905461
Ink Color	Blue
Manufacturer	Opticz
Manufacturer Part Number	DGINK2OZB
Model Number	DGINK2OZB
Number of Items	1
Paint Type	Alcohol
UPC	595013905461 890747002302
Volume	2 Fluid Ounces

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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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