_______ may be applied to the edge of the alginate trays to improve the fit of the tray

Pattern wax
Orthodontic wax
Beading wax
Boxing or utility wax

Boxing or utility wax

Rationale: boxing or utility wax – Utility wax ropes are used around the periphery of the alginate tray to extend the length of the alginate tray or to provide a better fit around the vestibular areas.