Five Printing Processes, and How to Choose the Right One

There is no single “best” printing process for every packaging project. The right starting point depends on the substrate, artwork, colour requirements, quantity, variable-data needs, finishing plan and delivery schedule. Use the comparison below to narrow the conversation, then confirm the choice against the actual packaging specification and a proof or sample where appropriate.

The five processes at a glance

Process	A useful starting question	What must be confirmed before a quote
Offset lithography	Is the artwork suited to a planned sheet-fed packaging run?	Board or paper grade, sheet size, colour references, coating and finishing route
Digital printing	Do you need version changes, variable data or a short run without making plates?	Substrate compatibility, colour target, file preparation, proof method and finishing
Flexography	Is the project better matched to a web or inline packaging process?	Substrate, ink system, plate requirements, registration, drying and converting steps
Gravure	Is the artwork and repeat production brief suited to engraved cylinders?	Cylinder preparation, substrate, ink and drying system, repeat plan and total project cost
Screen printing	Is a deposited ink layer or a special surface effect part of the brief?	Substrate surface, ink or coating, mesh/stencil setup, curing and colour sequence

The table is a project-planning framework, not a promise that one method will always be cheaper, faster or better. The same packaging format can be produced with different processes when the converter, material and finishing route change.

1. Offset lithography

Offset is an indirect process. The image is transferred from a flat plate to a rubber blanket, and then from the blanket to the print medium. Heidelberg describes sheet-fed offset as a commonly used technology for products such as packaging and folding cartons, with the ability to work across a range of print runs and substrates. See Heidelberg’s process description and packaging overview.

For a packaging brief, offset is a sensible process to discuss when the artwork is stable, the board is compatible with the selected press and the planned quantity justifies the preparation work. It can be a practical fit for detailed process colour work, but the final result still depends on paper or board, ink, coating, drying, proofing and finishing.

Before selecting offset, confirm

• the exact paper or board grade and caliper;

• whether the artwork uses process colours, spot colours or both;

• the required colour reference and proof method;

• coating, foil, lamination, die-cutting, folding and gluing requirements; and

• whether the selected converter can run the requested sheet size and format.

2. Digital printing

Digital printing transfers a digital image directly to a substrate instead of first making a physical plate or screen. HP’s industrial printing overview describes digital printing in this way and includes packaging and folding-carton applications. See HP’s digital printing explanation.

That direct workflow can be useful when a project needs short-run exploration, multiple artwork versions or variable information. It does not remove the need for a technical check: digital presses differ in supported materials, ink or toner behaviour, colour management, sheet size and finishing compatibility. A screen proof or physical sample may still be needed when the colour or surface effect is critical.

Ask the converter to confirm

• whether the chosen substrate is approved for the press;

• how the intended colour reference will be measured or reviewed;

• whether variable data or version changes are required;

• how white ink, metallic effects or special coatings are handled, if requested; and

• which finishing steps can follow the print process without changing the intended appearance.

3. Flexography

Flexography uses raised printing plates. In the flexo unit described by BOBST, an anilox roller meters ink to the raised areas of the plate cylinder, which then transfers the image to the substrate. BOBST also describes inline combinations of flexo printing with rotary die-cutting for packaging and displays. See BOBST’s flexo process description.

Flexo may be worth discussing for paper, carton, corrugated or film-based packaging when the substrate and the converter’s line are a good match. It is not enough to choose “flexo” from a menu: plate type, anilox specification, ink system, drying, registration and the downstream converting sequence all affect the result.

Confirm before approving the process

• the substrate and its surface treatment;

• plate artwork limits, minimum type and fine detail;

• ink system, colour sequence and drying conditions;

• registration requirements between print and die-cutting; and

• whether printing and converting will be inline or in separate operations.

4. Gravure

Gravure is a direct process that uses an engraved cylinder. Small cells in the cylinder hold ink and transfer it directly to the substrate. BOBST’s gravure materials describe this process for paper, carton, films and other substrates, and its carton lines combine gravure printing and converting in a continuous production setup. See BOBST’s gravure process and line overview.

For a packaging project, gravure should be evaluated together with the repeat plan, cylinder preparation, substrate, ink and drying system. Do not select it from a general claim such as “best quality” or “lowest cost.” The relevant question is whether the complete project, including preparation and repeat production, fits the process and the converter’s line.

Request confirmation of

• cylinder artwork and preparation requirements;

• the substrate, ink and drying combination;

• the expected repeat schedule and artwork-change plan;

• colour and registration checks; and

• the complete cost scope, including cylinders, setup, printing and finishing.

5. Screen printing

Screen printing, also called serigraphy or silk screen, is an analogue process in which ink is pushed through a stencil on a mesh. FESPA describes it as a versatile process used across fine art, textiles, signage and some industrial applications. See FESPA’s screen-process glossary.

For packaging, screen printing is usually considered because of a particular surface, ink deposit or decorative effect rather than because it is the default process for every carton. The practical result depends on the mesh and stencil, the ink or coating, the substrate surface, curing and the number and order of colours.

Before requesting screen printing, define

• the exact effect or ink layer required;

• the surface that will receive the ink;

• colour sequence and registration tolerance;

• curing or drying requirements; and

• how the screen step interacts with later coating, die-cutting or assembly.

How to choose a starting point

1. Start with the material. Name the paper, board, corrugated board, film or other substrate, including any coating or lamination.

2. Describe the artwork. State the number of colours, spot colours, colour references, fine text, images and any variable data.

3. State the quantity and version plan. Include the number of SKUs or artwork versions and whether the order is a one-off or a repeat project.

4. List the finishing. Note coating, varnish, foil, embossing, lamination, die-cutting, folding and gluing.

5. Choose the review method. Decide whether a digital proof, press proof, blank sample or production sample is needed before approval.

6. Ask for a process recommendation with reasons. The recommendation should identify the proposed process, the assumptions behind it and any material, colour or finishing risks.

A practical RFQ checklist

When asking for a packaging quote, send:

• package format, flat size and finished dimensions;

• material name, thickness or weight and surface requirements;

• artwork file status and colour references;

• quantity, number of versions and repeat expectations;

• printing and finishing requirements;

• sample or proof expectations; and

• destination market and requested delivery window.

For a sample-first discussion, see Why Packaging Samples Matter. To send a project brief, use the BOYA contact page. The final process choice remains specific to the approved specification, substrate, artwork and converter setup.

Reference note

The process descriptions above use public technical explanations from Heidelberg, HP, BOBST and FESPA. The comparison and checklist are editorial project guidance; they are not a guarantee of price, speed, quality, regulatory status or production capability for any particular supplier.