Printed envelop is widely used in business communication, packaging, invitation and greeting. Printed envelops are made of brown paper, Kraft paper and sulphate paper. There are many kinds in print envelops. Square envelops have equal sides, mostly used in greetings. Window envelops have a transparent part through which you can see sender’s address. Business envelops are professionally used in sending business mailings. Mailing envelops are for daily uses, like sending a family letter. Open end envelops have a self-stick end, which are very convenient to use. Flap envelops are not for daily uses, they have triangular end and usually used to hold CD, cards etc. Alternatively, we can print custom envelops which uses artworks form clients. Jumbo envelops are very large, suitable for sending big files and large number of documents. Airmail envelops, as the name suggests, are specially printed for sending airmails. Shipping envelops are used to sending shipping mailings and shipping documents. Some envelops are made pf vellum paper instead of Kraft paper. This kind of envelops are more durable and tear-resistant.