Envelop covers
An envelope is a common packaging item, usually made of thin, flat material. It is designed to contain a flat object, such as a letter or card.
About Envelop Covers
Traditional envelopes are made from sheets of paper cut to one of three shapes: a rhombus, a short-arm cross or a kite. These shapes allow for the making of the envelope structure by folding the sheet sides around a central rectangular area. In this manner, a rectangle-faced enclosure is formed with an arrangement of four flaps on the reverse side.
Windowed envelopes
A windowed envelope is an envelope with a plastic or glassine window in it. The plastic in these envelopes creates problems in paper recycling.
Security envelopes
Security envelope
Security envelopes have special tamper-resistant and tamper-evident features. They are used for high value products and documents as well as for evidence for legal proceedings.
Some security envelopes have a patterned tint printed on the inside, which makes it difficult to read the contents. Various patterns exist