Seam style frequently used in commercial open-side envelopes and announcement, invitation and baronial envelopes. Precision tool used to cut out envelope blanks, windows or other shapes. Creating the holes for envelopes. Interoffice and bank teller envelopes are often drilled to ensure that all contents are removed by the recipient. Finish or pattern applied to paper.
Registration is critical.
The front or side of the envelope without seams. Term used to describe the packing of envelopes with seal flaps open in a vertical position. Direction in which most of the fibers lie on a finished sheet of paper. Paper folds more easily with the grain, it offers greater resistance to being torn across its grain, and demonstrates greater tensile strength in the direction of the grain. Paper grade made from unbleached, bleached or colored wood pulp by the sulfate process.