Why People Put an Envelope in the Freezer

too long may allow the adhesive to warm and regain some of its original flexibility.

Opening the Flap Requires a Gentle Approach

The flap should never be pulled upward suddenly. Even when the glue has weakened, the paper may still be attached in several places.

A fingertip can be used to test one corner of the flap. If the edge begins to separate easily,continue reading …