Notice: the ICE Office will be closed through Monday, July 13th.

Due to UW-Madison campus access restrictions the ICE office will remain closed through July 13. The ICE Online Store will reopen on July 13 but only for limited service because of the restricted access to our facilities. Beginning July 13 ICE will process and ship SMALL orders once a week. We will aim for a processing time of 5-10 business days from receipt of order to shipping, operating within the constraints of very limited access. We apologize for any inconvenience and thank you for your patience and understanding as we work through a partial re-opening. If you have questions, please contact us by email at We will try to respond within 48 hours.

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.