BEADS ULTRA VIOLET COLOUR CHANGING PACK 250

• HL0015-02

The dangers of UV rays can be revealed using these simple beads.
These beads change colour when exposed to the UV light........ find out the effectiveness of your sunscreen or sunglasses.
Let students track their sun exposure by performing enquiry based experiments.

To make UV-reactive beads change color, you need a UV-A light source, ideally between 300-360 nanometers (nm), as this is the wavelength range that activates the photochromic dye in the beads. A simple black light (long-wave UV), which typically emits in the 365nm range, is sufficient for this.

UV Detection Beads
Height is 6MM
The diameter is 8MM
The inner diameter is 3.5M
250 PCS/Bag

Troubleshooting hint: If beads stop changing colour, place in freezer


Warning: choking hazard - not suitable for children under 3 years.