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Custom labels, food packaging labels, and nutrition labels are widely used in daily life and applied across industries such as food, healthcare, industrial manufacturing, agriculture, and personal care products. Do you know how labels are produced? In addition to printing with a flexographic printing machine, the process also includes design and plate making, proofing, flexo press setup and adjustment, surface finishing, die cutting, inspection, and slitting. This article will reveal each step in detail.

Flexographic Printing Machine for Roll Labels

Flexographic Plate Design

The first step in label production begins with flexographic plate design. At this stage, it is essential to communicate fully with the customer and professionally arrange the brand logos, text content, barcodes, QR codes, and graphic elements for cosmetic labels, and pharmaceutical labels. During the layout process, not only aesthetics but also substrate characteristics, printability, and color management must be considered. It is important to ensure that the artwork resolution and CMYK settings meet printing standards, while also leaving proper bleed margins for subsequent die cutting and slitting.

Flexo Printing Machine for Ingredient Labels

Plate Making

After the design is confirmed with the customer, label production enters the critical plate making stage. Technicians transfer the digital design files to specialized plate making equipment, using laser imaging or CTP (computer-to-plate) technology to accurately transfer the design onto the printing plate, forming the final plate. The quality of the printing plate directly affects the flexographic printing performance of the flexo printing machine, and thus impacts the quality of sticker labels, skincare labels, medical labels, and more. Therefore, the printing plate must feature clear graphics and strong durability.

Flexo Printing Machine for Bakery Labels

Flexo Press Setup

Even the most sophisticated printing plates must go through flexographic press setup and flexo printing to be transformed into productivity. Technicians need to continuously adjust parameters such as ink viscosity and printing speed based on the characteristics of the substrate. With a video inspection system, printing quality is monitored in real time to ensure the plate achieves over 99% registration accuracy. After precise adjustment of the flexo presses, only simple calibration is required to start mass production of adhesive labels, industrial labels, vitamin medical bottle labels and BOPP labels.

Flexo Printer for Takeaway Food Labels

Surface Finishing

After flexographic printing, surface finishing can be applied to the substrate to enhance durability and visual appeal. Common surface finishing processes include lamination and varnishing.

Lamination

Lamination can be divided into gloss film and matte film. Gloss lamination improves shine and abrasion resistance, making it suitable for bottle labels and jar labels. Matte lamination creates a subtle, frosted texture, ideal for vitamin medical bottle labels, perfume labels and jewelry stickers with a premium, understated positioning.

Varnishing

Varnishing involves coating a transparent layer to enhance the visual depth of graphics while providing moisture and scratch resistance. It is particularly suitable for barcode labels, address labels, and water bottle labels.

Flexographic Printer for Waterproof Food Labels

Die Cutting

After surface finishing, the web material enters the key step of label forming—die cutting. The material is smoothly fed into the die cutting station and shaped using precision dies. The waste matrix is automatically rewound during the die cutting process. This greatly improves the production efficiency of advertising stickers, QR code labels, shipping labels, equipment labels, and PET labels, while also reducing labor costs. After die cutting, the material has taken on the basic label shape, but it is still a semi-finished product and requires inspection and slitting.

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Inspection and Slitting

Traditional label inspection relies on manual work. Today, manufacturers can perform inspection using fully automatic inspection and slitting machines. Simply place the semi-finished web on the unwinding unit. After unwinding, industrial cameras capture real-time images of the printed material, transmitting each frame instantly and comparing it with standard templates to detect subtle defects such as color variation, stains, and registration errors. Defective products are automatically rejected, while qualified products are conveyed to the slitting unit for slitting and rewinding. In this way, finished products such as Thank You sticker labels, beverage labels, lip balm labels, and vinyl labels are produced.

Flexo Printing Machine for Wine Labels

Every stage of label production is closely interconnected, reflecting both rigorous craftsmanship and technical expertise. By mastering the details of design and plate making, plate production, press setup, surface finishing, die cutting, and inspection and slitting, manufacturers can effectively control the quality of beauty product labels, thermal labels, foil labels, and more, giving products a more professional identity.