- Who
- University of Colorado Boulder, Ivan Smalyukh
- What
- 97-99 percentage
- Where
- United States (Boulder)
- When
The most transparent material has a total visible transmission percentage of 97-99% and was achieved by Ivan Smalyukh and University of Colorado Boulder (all USA) in Boulder, Colorado, USA, on 7 June 2019.
In comparison, single clear glass is around 92%.
