Envelopes are a common printed product in the printing industry, widely used in various occasions such as business letters, invitations, and gift packaging. The format of the envelope is a crucial aspect of envelope printing, directly affecting its appearance, function, and usability. This article will introduce relevant knowledge about envelope formats, including size, shape, material, and printing processes.

I. Envelope Size and Shape

The size and shape of an envelope are determined by the size and purpose of the letter. Common envelope sizes include letter paper size, letterhead size, and letter card size. Envelope shapes include rectangles, squares, rectangular windows, and square windows, among others. Choosing the appropriate size and shape according to different needs can improve the practicality and aesthetics of the envelope.

II. Envelope Materials

Envelope materials typically include paper, plastic, and cloth. Paper is the most common envelope material, and different paper textures and thicknesses can be selected as needed. Plastic envelopes have waterproof and dustproof properties, making them suitable for mailing and storage in special environments. Fabric envelopes are more durable and upscale, suitable for gift wrapping and other occasions.

III. Envelope Printing Process

The printing process of an envelope determines its appearance and quality. Common envelope printing processes include offset printing, gravure printing, and screen printing. Offset printing is the most commonly used process, capable of producing high-definition images and text. Gravure printing is suitable for envelopes requiring added texture and depth. Screen printing is suitable for envelopes with special materials and effects.

IV. Key Points of Envelope Printing Design

1. Printed Content: The printed content on the envelope should be concise and clear, including sender, recipient, and address information. Company logos and advertising slogans can be added as needed.

2. Printing Position: The printing position should be rationally arranged to avoid conflict with the folding and sealing positions of the envelope.

3. Printing Colors: Choose suitable printing colors to ensure the printed content is clearly visible and matches the envelope’s material and purpose.

4. Printing Effect: Select appropriate printing processes as needed to enhance the texture and aesthetics of the envelopes.

V. Envelope Printing Equipment

Envelope printing equipment is a key tool for achieving the desired envelope printing results. Common envelope printing equipment includes offset printing machines, gravure printing machines, and screen printing machines. These machines have different characteristics and applicable ranges; the appropriate equipment can be selected based on production scale and needs.

Summary: Envelope format is a crucial aspect of the printing industry, directly affecting the envelope’s appearance, function, and usability. When printing envelopes, factors such as size, shape, material, and printing process must be considered, and appropriate printing equipment should be selected based on the specific needs. Through reasonable envelope format design and printing, the practicality and aesthetics of the envelopes can be improved, meeting the needs of different occasions.