Envelopes manufacturing is the process of creating various types of envelopes for commercial and personal use. This industry involves the production of envelopes in different sizes, shapes, colors, and materials. The envelopes can be plain or printed with logos, addresses, and other designs. The manufacturing process includes designing, printing, cutting, folding, gluing, and packaging the envelopes. The envelopes can be made from paper, cardboard, plastic, or other materials depending on the intended use. The envelopes can be used for mailing letters, documents, invoices, checks, and other items.