LadyStanley
Registered User
https://www.cbc.ca/sports/hockey/nhl/new-puck-technology-winter-classic-1.4940777
NHL will debut thermochromic writing on pucks that will show when a puck is good to use (frozen/purple tint) to warm (clear) at the 2020 Winter Classic.
NHL will debut thermochromic writing on pucks that will show when a puck is good to use (frozen/purple tint) to warm (clear) at the 2020 Winter Classic.