What Are The Four Types Of Printing?

According to the printing plate structure, ink transfer method and application scenarios, the printing process is mainly divided into the following four core types. Each type varies significantly in terms of process characteristics, suitable materials and typical applications:
1.Letterpress Printing
How it works: The image and text areas of the template are raised, not recessed. Ink is transferred directly to the substrate through a raised area.
Features:
A long history: the earliest printing methods (e.g., ancient Chinese movable type printing, are now mainly used for professional applications.
Thick ink layer: Printed products have a distinct embossing marks and stereoscopic feel.
Low platemaking cost is low: suitable for short-term printing and simple printing.
Typical application:
Packaging: Self-adhesive label, security label, bill printing (e.g. invoices, receipts, etc.).
Publication: Some art books, envelopes, greeting cards and other printed materials requiring stereo effects.
Industry: Simple labels are printed on metal nameplates and plastic parts.
Limitations: Printing accuracy is lower than gravure and offset printing, the long-term operating costs are higher. Flexographic printing is gradually replacing some of these markets.
2. Gravure Printing
Principle: the image area of the plate to be indented, the plate to be indented by the non-image area. Ink fills the grooves and the doctor's blade removes excess ink before transferring it to the substrate.
Features:
Fine image: The engraved printing plate can achieve a high line count (for example, 175 rows per inch) with exceptional details.
Thick Ink Layer: Ink deposits thickness up to 4-8 g/m2, color saturation high, durable.
Cost Sharing: Prints are expensive but suitable for long printing periods (e.g. cigarette packs and wine labels).
Typical application:
Flexible Packaging: food bags, laminates (such as potato chip bags, laundry detergent packaging).
Publications: some high-end brochures and magazine covers (UV curing ink required).
Industrial Products: Hardware decoration, building wallpaper, floor coverings, etc.
Environmental challenges: Traditional solvent inks have high VOC emissions and therefore require improved water-based/UV-cured inks.
3. Lithographic Printing (Offset)
Principle: According to the principle of oil-water immiscibility, the image portion of a printing plate is hydrophilic, not the image portion. Printing is accomplished by separating the fountain solution from the ink.
Features:
High printing quality: Accurate dot reproduction, rich color gradation, suitable for fine graphics.
Wide Applicability: can be printed on paper, metal foil, plastic film and so on.
Complex copy preparation: requires PS (pre-sensitized plates) and chemical development, and is therefore costly.
Typical application:
Publication: books, magazines, posters, leaflets, etc.
Packaging: upscale paper boxes, medicine boxes, cosmetics packaging (require to be lamination/hot stamping).
Business Press: Corporate brochures, product catalogs, calendars, etc.
Development Trend: CTP technology has shortened platemaking cycles, digital offset printing technology has driven the growth of the short-run market.
4. Screen Printing
How it works: Ink seeps into the mesh (stretched with metal or nylon mesh). Non-image area is blocked with latex, and the ink is then transferred to the substrate under pressure of a squeegee.
Features:
Thickest ink layer: can be painted 30-100g/m2, with strong stereo effect and abrasion resistance.
Suitable for a variety of materials: for printing of flat surfaces, curved surfaces, alien surfaces (e.g. glass, ceramics, textiles, etc.).
Unique color rendering: suitable for fluorescence, metal color and other special inks.
Typical application:
Textiles: Printed on T-shirts, flags, banners and sportswear.
Electronics: Conductive layer on printed circuit boards, membrane switches, and LCD displays.
Industrial products: glass bottles, metal cans, plastic toys on the decorative stamp.
Art: Posters, prints, murals and other creations requiring special effects.
Technical Extensions: UV screen printing to achieve a high gloss, abrasionresistant surface, widely used in packaging and decoration.
Comparative Summary of four Printing Technologies
Type Ink Layer Thickness Printing Precision Cost (Long Cycle) Environmental Performance
(Water-based Ink) Paper, Self-adhesive Labels, Metal Nameplates
High Altitude (Solvent-based Ink) ★ ★ ★ ★ Plastic, Metal Foil, Laminated Film
★★★ ½ medium size.Vegetable Oil-based) Paper, cardboard, Metal Foil
★★ (UV Ink) Textiles, glass, ceramics, plastics
Selection Recommendations
Short Runs/Customization: Flexographic (environmentally friendly, low cost) or digital printing (no copy making required) is preferred.
Long-line/ detailed graphics: gravure (flexible packaging) or lithography (publications) are more economical.
Special materials/ effects: The adaptability and 3D effects of wire mesh printing are irreplaceable. Environmental requirements: Hydrating ink (flexo/lithography) and UV ink (porcelain) are the mainstream solutions.