How can length or depth of the alginate impression tray borders be extended?

Question

Quizplus · Accepted Answer

The length or depth of the alginate impression tray borders can be extended by adding utility wax to the tray.
Acrylic is a material used to fabricate a custom tray; it is not used as an addition to a stock tray.
Boxing wax is used to enclose an impression,to aid in pouring the model.
Border molding compound is used with custom acrylic trays,not stock alginate trays.

How Can Length or Depth of the Alginate Impression Tray