What is the maximum allowed surface temperature of ice for optimal performance?

The maximum allowed surface temperature of ice for optimal performance is indeed 28°F (-2°C). This temperature allows for the best conditions for skating and other ice activities by ensuring that the ice remains firm while still being soft enough to provide a good grip for skates. At this temperature, the ice is less likely to develop soft spots or create an overly wet surface, which can happen if the temperature approaches 32°F (0°C), the freezing point of water.

Maintaining ice at around 28°F offers a balance between hardness and grip. Temperatures lower than this can lead to a harder surface that may not be as enjoyable for recreational skating, while temperatures higher can increase the risk of slushiness or melting, which can negatively affect performance. Thus, 28°F (-2°C) is considered optimal for both the structural integrity of the ice and the user experience.