UV Beads, Change to Red, Ultraviolet: Educational Innovations, Inc.

Watch white beads change to red when taken outside the building! When returned they turn back to white. What causes the change? Humidity? Temperature? Fresh air? Birds flying overhead? The beads contain pigments which react with ultraviolet light from the sun, even on a cloudy day. They also change with most classroom UV light sources. Students can make their own UV light detecting bracelet by stringing the beads on a pipe stem or on a strip of rawhide. Great for teaching UV awareness! Use the beads to test the UV blocking effectiveness of sunblock, sunglasses, windows, etc. Lesson activities are included. The ultraviolet beads will cycle back and forth (to red and back again) over 50,000 times! Approximately 250 beads per package. All of our UV beads are the same size. Approximate bead dimensions: diameter 8.5 mm (5/16") - center hole 3.6 mm (9/64") Read more on our Blog - Chemistry of Ultraviolet Detecting Beads with Video Read more on our Blog - UV Radiation Activity

UV Light: Educational Innovations, Inc.

Steve Spangler Science UV Color Changing Beads, Set of Approx. 250-Colors Included: Red, Purple, Yellow, Orange- Experiments for Kids, Educational Toys : Toys & Games

Magical Uv Beads - There are approx 600pcs hair beads, Mixed colors ,7 assorted translucent colors: rose, orange, yellow, fuchsia, blue, indigo,

Amaney 600 Pieces UV Beads Multi Color Changing UV Reactive Plastic Pony Beads Glow in The Dark

UV Color-Changing Beads

UV Light: Educational Innovations, Inc.

Ultraviolet Detection Beads

UV Beads, Change to Red, Ultraviolet: Educational Innovations, Inc.

Uv beads

Miraclekoo UV Beads Scientific Multi Color Changing Bead UV Reactive Plastic Luminous Pony Beads,Fun for Jewelry/Bracelets Making,1000 Pcs : Arts, Crafts & Sewing

Changes color immediately when exposed to sunlight, even on cloudy and rainy days, The more UV ray, the darker it will be. 7 Assorted Colors: Rose,

Miraclekoo UV Beads Scientific Multi Color Changing Bead UV Reactive Plastic Luminous Pony Beads,Fun for Jewelry/Bracelets Making,1000 Pcs

UV Beads, Change to Red, Ultraviolet: Educational Innovations, Inc.