Ball Compression & Coefficient of Restitution

The fraction of energy retained after impact with the pitch — typically 0.55–0.65 for a new red ball.

The cricket ball's cork-and-leather construction dates to the 1770s (Duke's of Kent); pink and white balls were introduced later for day-night and limited-overs cricket.

Lower CoR = lower bounce; pink balls are tested at a tighter range to ensure visibility behaviour matches red.