Notice: the ICE Online Store and Office will be closed through June 2021.

The ICE office and Online Store will be remain closed until June 7, 2021.

Due to the COVID-19 pandemic we are unable to ship orders during the rest of the spring 2021 semester. We apologize for any inconvenience and thank you for your patience and understanding. Questions or inquiries about kits or publications should be sent to If you have questions, please contact us by email at We will check and respond to emails once a week during the closure.

Photochromic ICE T-shirt, Adult

Photochromic ICE T-shirt, Adult

Type: D    |    Level: Al Levels

Watch its colors change in sunlight! This snazzy white T-shirt has a black outline of the ICE structure on the front and a smiling sun on the back. Step into sunlight, and the designs become bright shades of blue, purple, yellow and orange! UV active dyes in the shirt are colorless in room light, but become brightly colored in sunlight.

What happens and why? Use this T-shirt to teach students how conjugated double bonds absorb light. The dyes in the ink become more conjugated when exposed to sunlight resulting in a colorful, light absorbing form; they relax to a less conjugated, colorless form when removed from light.

The shirts, made from 100% heavyweight cotton, are washable and come in both child and adult sizes.