Definitions for "Thumb Cut"
An envelope without a flap. U-shaped cut at open end permits easier access to contents. Often used for job ticket or as negative preservers.
The cut-out on back of blister card to facilitate opening of the blister to expose product.
Small rounded cutouts in top of envelope. Three types are used; through face and back, through face or through back. Usually used in envelopes without a seal flap.