Notice: the ICE Office will be closed through Tuesday, June 30th.

In response to the COVID-19 situation we must close the ICE Online Store until June 30th. Our offices will reopen on Wednesday, July 1st. The University of Wisconsin-Madison has requested that only absolutely essential operations continue. Therefore, ICE staff cannot take and ship orders. We regret the inconvenience but these are not typical times. As the COVID-19 situation develops further we will post updates here. 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.