An envelope is a form of packing. Envelopes are used for sending letters or documents using regular postal mail. Envelopes are usually made of paper or hardened paper. An envelope may be small enough to make you need to fold the paper going into it, or it can be as large as the paper so that you do not need to fold it.

There are six main types of paper grades used in envelope production: Wove, Surfaced Enhanced White Wove, Kraft, Recycled, Specialty, and Tear-resistant. ... Kraft – Kraft paper is strong, has longer fibers than wove and is commonly seen in brown stock.

Regular Envelopes are the standard of business envelopes. This product range includes the popular #10 envelope which measures 4 1/8" by 9 1/2". All regular envelopes feature a solid front with no window, and a basic flap on the back.

Envelope is also doing a work of your business advertisement. When you send or give any document in your company envelope. Automatically your brand goes to the user, which help to create business.