10PCS Reusable UV Test Cards UPF50+ Color-Changing Sun Tester
10PCS Reusable UV Test Cards UPF50+ Color-Changing Sun Tester
10PCS Reusable UV Test Cards – Instant UPF50+ Sunshine Detection
Stay smart about sun exposure with these handy UV Test Cards. Simply step outside and watch the card change color in seconds to indicate ultraviolet intensity — no batteries, no apps, no guesswork. Perfect for outdoor adventures, travel, or everyday use, these pocket-sized cards are a must-have tool for anyone who spends time in the sun.
Product Specifications
- Material: High-quality art cardboard
- Size: 10.5 × 4.5 cm (4.13 × 1.77 in)
- Color: Black
- UPF Rating Detection: UPF50+
- Quantity: 10 cards per pack
- Reusable: Recovers to original state in approximately 1 minute after use
- Country of Origin: Made in Mainland China
Key Features
- ✅ Instant Color-Changing Indicator: Visually detects UV / ultraviolet levels outdoors with a fast, clear color change response
- ✅ UPF50+ Rated Detection: Great for testing sunscreen effectiveness, UV-protective fabrics, or window films
- ✅ Reusable & Eco-Friendly: Resets automatically within about 1 minute — use it again and again
- ✅ Portable & Compact: Slim enough to slip into a pocket, wallet, or backpack
- ✅ Durable Construction: Made from quality art paper/cardboard for long-lasting use
- ✅ Pack of 10: Enough to share with family, friends, or your outdoor group
How to Use
- Take the UV test card outdoors or hold it under a UV light source.
- Observe the color change on the card — the more intense the UV, the deeper the color shift.
- Bring the card back indoors or into shade and watch it reset within ~1 minute, ready for the next test.
What's in the Box?
10 × UV Test Cards (Black, 10.5 × 4.5 cm each)
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Learn more: EPA UV Index information
Frequently Asked Questions
Q: How do UV test cards work and what do they detect?
A: UV test cards contain a special photosensitive coating that reacts to ultraviolet (UV) radiation from the sun or artificial UV sources. When exposed to UV light, the card changes color to visually indicate the level of UV intensity present. These UPF50+ cards are ideal for checking the UV-blocking ability of sunscreens, clothing, glasses, or window films outdoors.
Q: Are these UV test cards truly reusable?
A: Yes! Each card is fully reusable. Once you move the card out of UV light (indoors or into shade), it naturally returns to its original black color within approximately 1 minute, making it ready for repeated testing sessions with no replacement needed.
Q: What is the best way to carry and store these UV test cards?
A: Thanks to their slim, compact size (10.5 × 4.5 cm), these UV test cards fit easily in a pocket, wallet, or small bag compartment. Store them away from direct sunlight when not in use to preserve the photosensitive coating and extend their lifespan.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.