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

€ 32.83

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Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔵 Illuminate the unseen, secure the scene!

SIZE YOUR NEEDS - Available in 5 convenient sizes from 2oz to 32oz—bulk discounts keep you covered.
FAST SAFE FORMULA - Alcohol-based, quick-drying, and non-toxic for worry-free use in professional settings.
TRUSTED BRAND POWER - Opticz quality ensures consistent performance trusted by thousands of pros worldwide.
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.

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 bulk discounts, it’s ideal for security marking, event stamping, and creative applications. Non-toxic and trusted by professionals, this ink delivers reliable, covert visibility for your valuables and projects.

Specifications

ASIN	B005X8PKBI
Best Sellers Rank	#43,252 in Office Products ( See Top 100 in Office Products ) #53 in Bottled Pen Ink
Brand	Opticz
Brand Name	Opticz
Container Type	Bottle
Customer Reviews	4.2 out of 5 stars 1,070 Reviews
Global Trade Identification Number	00595013905461
Ink Color	Blue
Item Volume	2 Fluid Ounces
Manufacturer	Opticz
Manufacturer Part Number	DGINK2OZB
Model Number	DGINK2OZB
Number of Items	1
Package Information	Bottle
Paint Type	Alcohol
UPC	595013905461 890747002302
Volume	2 Fluid Ounces

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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How is product pricing calculated?+

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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€ 32.83

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Finland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Customer service was outstanding when I had questions about the product.

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