How Custom Printed Packaging Is Made: Production Process Guide

How is custom printed packaging made? The short answer

Custom printed packaging is made in eleven broad stages: the buyer's specification is turned into a structural design and dieline, the artwork is prepared for press, tooling such as plates, cylinders and cutting dies is made, the base material is bought and conditioned, then the material is printed, coated or laminated, converted into its final shape, checked, packed and shipped. The order is broadly the same for a paper cup and a corrugated mailer; the machines, materials and critical parameters change.

The universal process line:

Some stages swap places or merge depending on the product:

• Barrier coating usually happens before printing for food boxes and cups (the board is coated on the reel at the mill or a specialist coater), and after printing for varnishes and film lamination on cartons.
• Printing and converting run in one pass on many reel-fed lines, for example a paper bag machine with inline flexo units or a napkin line that prints, embosses and folds in sequence.
• Pouches add a curing stage after lamination that can take days, and plastic bags add a film-making stage (blown film extrusion) before printing.
• Corrugated boxes add a board-making stage (the corrugator) before printing, unless the converter buys in sheets.

The sections below follow the chain, then compare the seven families, then cover the topics that apply to all of them.

The universal production chain, stage by stage

Each stage has a typical failure and a buyer approval or input that guards against it. The table summarises them; the paragraphs after it explain the stages buyers ask about most.

Specification and RFQ

Production starts when the specification is complete enough to quote without guessing. A quotation for "a printed burger box" can mean very different board grades, barriers and print processes; each one changes the production route. A good RFQ fixes the product type and size, the material or the performance it must reach, the print (colours, coverage, inside or outside), the quantities per design, the food and temperature conditions and the destination markets. How to structure it is covered in the packaging RFQ guide.

Structural design and the dieline

The dieline is the flat drawing from which the cutting die, the print layout and often the machine settings are made. For cartons, corrugated boxes and food boxes it defines every cut, crease, glue flap and vent. For bags, cups and pouches the format is defined differently (tube width, gusset and cut-off length for bags; the curved fan for cups; web width and seal pattern for pouches), but the principle is the same: structure is fixed before artwork is final. Dieline and tooling choices for cartons are explained in carton dielines and tooling.

Artwork and prepress

Prepress (Druckvorstufe in German) turns approved artwork into files a press can print. Typical steps are preflight checks, colour separation into the process and spot colours that will actually be printed, trapping so small register movements do not leave gaps, distortion compensation (flexo plates stretch around the plate cylinder; cup fans are curved), step-and-repeat across the sheet or web, and proofing. File requirements are in the packaging artwork guide, and the vocabulary in the printing and prepress glossary.

Tooling

Tooling is anything made specifically for your design or format. Flexo needs a photopolymer plate per colour, offset an aluminium plate per colour, gravure an engraved cylinder per colour, and digital printing no image carrier at all. Die-cut items need a steel rule cutting die and a creasing matrix (flatbed) or a rotary die; some bag, cup and pouch formats need format parts or change parts. Tooling is often charged separately and reused on repeat orders, so ownership and storage are worth agreeing at the first order.

Material procurement and conditioning

Paper and board change dimension with moisture, film changes behaviour with temperature and static, and both affect every downstream setting. Converters typically check incoming lots for grammage or thickness, moisture, surface treatment and documentation, then let reels or pallets acclimatise to the pressroom before use. Laboratory tests on paper and board are normally run in the standard atmosphere of ISO 187 (23 °C, 50 % relative humidity), which is also a useful reference when comparing supplier test results. Material availability is frequently the longest variable in the schedule; see packaging lead times.

Printing, coating and converting

The family table below shows which print processes and converting machines each product uses. Two points apply everywhere: the print process is chosen mainly by substrate, image quality and run length (covered under print process selection below), and converting is where the structure is made, so most functional failures (leaking cups, splitting bags, cracking creases, weak pouch seals) start at a converting station rather than at the press.

QC, packing and shipping

Quality control runs through the whole chain, not only at the end: incoming checks, first-off approval at make-ready, in-process checks at intervals, laboratory tests and final inspection. Packing protects the product's dimensions and moisture content until use, which matters for long export routes. Sampling plans and complaint handling are covered in packaging sampling and quality control; export transport from Türkiye in sourcing packaging from Türkiye.

How do the seven packaging families differ in production?

The chain is shared, but each family uses different materials, presses and converting machines, and each has its own critical parameters. The table compares them; follow the link in the last column for the full process, including station-by-station converting, test methods and defect tables.

Grammage and thickness ranges are typical working ranges used across this site, not standards. The final specification for an item depends on size, load, food and use conditions.

Which product hubs belong to which family?

If you are specifying a product rather than researching a process, start at its product hub:

• Paper bags: paper carrier bags, takeaway bags, paper food bags
• Cups and containers: paper cups, cup sleeves and carriers, paper food containers
• Cartons and food boxes: folding cartons, burger boxes, takeaway boxes
• Corrugated: pizza boxes, mailer boxes
• Film and flexibles: plastic bags, stand-up pouches
• Thin papers and tissue: greaseproof paper, napkins

Cup sleeves are die-cut and glued from board in the same way as cartons; moulded fibre carriers come from a separate pulp-moulding process that is outside the scope of this series.

How is the print process chosen for a packaging run?

The print process is chosen by substrate first, then by image quality and run length. Flexo dominates reel-fed paper, film, corrugated and tissue; sheet-fed offset dominates cartons and many cups; gravure suits very long, repeating runs on film; digital suits short runs, versions and prototypes because it needs no plates.

Run length matters because each analogue process carries a fixed set-up cost (plates or cylinders, make-ready time and make-ready waste) that is spread over the run. Gravure cylinders cost the most and last the longest, so gravure pays back on long, repeated designs. Flexo plates are cheaper and are made quickly, so flexo covers medium to very long runs. Offset plates are inexpensive, but make-ready on a sheet-fed press takes time and sheets. Digital printing has almost no set-up but a higher cost per unit, so it wins on short runs and loses on long ones. The exact crossover depends on the product, the number of colours and the press.

Practical rules a buyer can use:

• Do not specify the process unless you have a reason; specify the visual result and let the manufacturer propose the route, then ask why.
• If you plan several designs or frequent changes on a small total quantity, ask whether digital printing or a shared plate layout is possible.
• On brown kraft or porous liners, fine photographic detail is limited whatever the process; simplify artwork rather than paying for a process the substrate cannot use.

The full comparison with screen rulings and set-up costs is in flexo vs offset vs gravure vs digital printing.

How is print colour controlled in production?

Colour is controlled by agreeing a measurable target before printing and checking against it during the run: the target is a Pantone reference or measured Lab values on the actual substrate, the tolerance is agreed in Delta E (preferably ΔE00), and the press is approved against a signed proof, drawdown or reference sample. During the run, operators measure solids with a spectrophotometer at intervals and adjust ink and pressure.

The working tools in a pressroom are:

• Ink drawdowns on the production substrate for spot colours, approved before the run.
• Contract proofs for process colour work, made to a print standard and only valid if the substrate and process are comparable.
• Colour bars or control patches on the sheet or web, measured inline or offline.
• Standard viewing light (typically D50 viewing booths for graphic arts) for visual approval.
• Ink management for flexo and gravure: viscosity and, for water-based inks, pH checked at intervals, because drift shows up as colour change.
• Retained, signed reference samples for repeat orders.

The substrate sets the ceiling. A spot colour on brown kraft or recycled liner varies with paper shade and absorbency, so tolerances are usually wider than on coated white board. Tolerance values, measurement modes and proof types are explained in Pantone vs CMYK for packaging.

Food-contact production hygiene and GMP

In the EU, food-contact packaging must be made under Good Manufacturing Practice as required by Regulation (EC) 2023/2006: a documented quality assurance system, a quality control system and documentation covering each manufacturing stage that affects the material. Its annex adds a specific rule for printing inks on the non-food side. Great Britain applies an assimilated version of the same regulation.

What the GMP Regulation requires, in production terms:

• A quality assurance system: documented procedures, trained staff, suitable premises and equipment, and selection of starting materials that allow the finished packaging to comply with Regulation (EC) 1935/2004.
• A quality control system: monitoring that GMP is actually followed, with corrective action when it is not.
• Documentation: specifications, formulations and processing records relevant to compliance and safety, available to authorities on request.

The annex on printing inks applied to the non-food-contact side requires that inks are formulated and applied so that substances are not transferred to the food-contact side, either through the substrate or by set-off when printed material is stacked or wound on a reel, at levels that would breach Article 3 of Regulation (EC) 1935/2004. It also states that printed surfaces must not come into direct contact with food. In practice this drives ink selection (low-migration or food-packaging ink systems from suppliers who provide compliance information), full drying or curing before rewinding and stacking, controlled stack and reel pressure, and set-off testing on finished goods. In Germany, the ink rules in the Printing Ink Ordinance (an amendment to the Bedarfsgegenständeverordnung) apply from 1 January 2027; see Germany and Austria packaging compliance.

Hygiene on the factory floor typically includes separation and labelling of food-contact materials, inks and adhesives; covered storage of reels and finished goods; cleaning schedules; pest control; glass, brittle plastic and blade policies; control of lubricants near the product path; and slug and dust extraction at cutting stations so waste does not end up in finished packs.

Buyers often ask whether a manufacturer is certified to a hygiene or food-safety scheme for packaging. The schemes most often requested are:

Certification is not a legal requirement under EU food-contact rules, while GMP under Regulation (EC) 2023/2006 is. If a customer or retailer requires a scheme, ask for the certificate and read the scope; this guide does not describe the certification status of any particular manufacturer. Documentation for the finished product, such as the Declaration of Compliance, is covered in food-contact packaging compliance.

Traceability and batch coding

Traceability means that a delivered carton of packaging can be traced back to the production run, the material lots and the ink and adhesive batches that went into it, and forward to the customer who received it. In the EU, Article 17 of Regulation (EC) 1935/2004 requires traceability of food-contact materials at all stages; the GMP Regulation's documentation requirement supports it.

A workable system usually has four links:

1. Incoming lots: each reel, pallet of board, resin lot, ink batch and adhesive batch receives an internal lot number linked to the supplier's certificate.
2. Production records: the job or work order records which lots were used, on which machine, on which date and shift, with first-off approvals and in-process check results.
3. Batch code on the pack: a code on every outer carton, sleeve or reel label (and sometimes on the item itself) that points to that production record.
4. Retained samples: a set of finished items kept per batch for a defined period so a complaint can be checked against the original output.

For buyers, two questions test whether this works: ask what is printed on the carton label and what it links to, and ask how long it takes the manufacturer to identify the material lots behind a given batch code. Retention periods and complaint handling are covered in packaging sampling and quality control.

Why is there a minimum order? Waste and make-ready economics

Minimum order quantities exist because every custom run has fixed costs that do not depend on quantity: tooling, prepress, make-ready time and make-ready waste, wash-up, and the minimum quantity of material that can be bought or run economically. Spread over a small order, those costs dominate the unit price; MOQ is the point at which a manufacturer can run the job without losing money or blocking a high-volume machine.

Make-ready is the work between two jobs: changing plates, cylinders or dies, adjusting ink and register, setting folding and gluing sections, and producing good samples for approval. During make-ready a press or converting line consumes material that becomes waste. On a sheet-fed press that can be a few hundred sheets; on a wide-web CI flexo or gravure press, and on a laminator, start-up waste is measured in hundreds of metres or more, depending on machine, format and material. Reel-fed converting lines, such as bag, cup and pouch machines, also run fastest on long jobs and lose output at every format change.

Material buying adds a second floor. Special grammages, barrier boards, coloured films and certified grades are often available only in mill-run quantities, or the reel width must be slit from a larger parent reel. A small job may need the converter to buy, and pay for, more material than it uses.

How MOQs vary by product and process, and ways to work with them, are covered in what determines MOQ in custom packaging; the full cost structure in custom packaging cost drivers.

Production planning and lead time

A custom packaging order typically takes several weeks from final artwork approval to delivery, and the run itself is usually the shortest part. Approvals, tooling, material availability and the queue in the manufacturer's schedule decide most of the lead time; transport adds days by road or air and weeks by sea.

Manufacturers plan production around machine capacity, material arrival and tooling. A job is usually scheduled only when three things are in place: approved artwork and proof, tooling ready or confirmed, and material in stock or with a confirmed arrival date. Many plants also group jobs that share a material, a reel width or a colour set to reduce changeovers, which is one reason why a supplier may offer a date that is later than the time the run itself would take.

Practical points for buyers:

• The schedule date is only firm after the last approval. A late proof correction can move a job behind others in the queue.
• Material is the usual unknown. Ask whether the specified grade is stocked or ordered per job.
• Multi-stage products (pouches with curing, cups with secondary wrapping, cartons with off-line foil or lamination) take longer than single-pass items even at the same quantity.
• Peak season for foodservice and retail packaging can lengthen queue time; plan launches and rebrands accordingly.

Stage-by-stage durations and transport times from Türkiye are covered in packaging lead times.

How to read a production schedule: milestones for buyers

A production schedule is a list of milestones, each with an owner. The table shows the milestones a buyer should expect to see, what each one means and what to do if it slips. Durations are not given because they depend on the product, the route and the manufacturer's schedule; ask for dates against each line.

A slipped milestone early in the list usually costs more time than the delay itself, because the job loses its slot in the schedule.

Sampling and approvals: what the buyer signs off

The buyer typically approves four things during production: the dieline (structure), the proof (artwork and colour intent), the press or colour standard (how the print must look), and, for new items, a pre-production or first-article sample (how the finished item performs). Each approval freezes one set of decisions so the next stage can start.

The approval steps differ by product. A repeat order on existing tooling may need only a proof check. A new structure, a new material or a new barrier usually justifies a white sample, a digital or contract proof and a sample from production tooling before the full run. Food-contact items with grease, heat or liquid exposure benefit from functional tests on real food or simulants before approval. A signed "golden sample" retained by both sides becomes the reference for inspection and complaints.

Sample types, what a pre-production approval document should contain, AQL sampling under ISO 2859-1 and third-party inspection are covered in packaging sampling, pre-production approval and quality control.

What quality checks happen during production?

Quality checks happen at four points: incoming material inspection, first-off approval at make-ready, in-process checks during the run, and final inspection with laboratory tests before release. The tests themselves differ by family; the structure is the same.

Common defects and their causes are listed in the defect tables of each family guide. Test method names and defect terminology are defined in the testing, quality and defects glossary.

How do you evaluate a manufacturer's production capability?

Evaluate production capability with evidence rather than claims: ask which stages are done in-house and which are outsourced, which machine types run your product, how the plant controls colour, food-contact hygiene and traceability, and ask for documents and samples that show it. A short factory visit or a video walk-through, plus test reports on comparable products, tells you more than a brochure.

Questions to ask

• Which stages of the chain do you run in-house, and which are subcontracted (for example board barrier coating, gravure cylinder engraving, cutting dies, film extrusion)?
• Which machine types will my product run on: reel-fed or sheet-fed, inline or offline printing, which converting machine?
• What is the maximum and minimum format of those machines, and does my size fit without special tooling?
• How do you set and check colour: what target, which Delta E formula and tolerance, who measures and how often?
• How do you control set-off and migration for food-contact items: ink system, drying or curing, stack and reel pressure, testing?
• What hygiene controls apply to the food-contact lines, and which hygiene or food-safety scheme certificates (if any) cover this site and product type?
• How does a batch code on the outer carton link back to material lots and production records, and how long are retained samples kept?
• Which tests do you run in-house, and which are sent to external laboratories?
• What happens when a run fails a check: how are non-conforming goods isolated, and how are you informed?
• How are pallets built for export, and what protection against humidity is used?

Evidence to request

A full supplier evaluation framework, including red flags and a decision matrix, is in how to choose a packaging manufacturer. How to structure the enquiry is in the packaging RFQ guide, and what changes when the manufacturer is in Türkiye (documentation, transport, Incoterms) is in sourcing packaging from Türkiye.

Packing, palletising and transport: the last production stage

Packing is part of production because it decides whether the packaging arrives in the condition it left the line. Paper and board items take up moisture from humid air, which causes curl, warp and weaker creases; stacked cartons and cups can deform under pallet weight; film products can block if stored warm under pressure.

Points that matter across all families:

• Pack count and unit: bundles, sleeves, shrink-wrapped stacks or cartons, matched to how the packaging is used at the counter or packing line.
• Carton marking: product description, quantity, batch code and any customer reference on each outer case.
• Pallet build: pallet type (for example EUR pallets for European destinations), maximum height and weight for the receiving warehouse, corner boards, top sheets and stretch wrap.
• Moisture protection: film wrapping and, on long sea routes, attention to container condensation.
• Storage advice: products are best stored dry, off the floor and away from heat; barrier-coated and laminated items keep their properties longest in stable conditions.

Family-specific packing (cup sleeving, flat-pack bundles for corrugated, reel specifications for roll stock) is described in each family guide.

Terminology by market

Production terms vary by market. These are the ones a buyer is most likely to meet in quotations and specifications:

More terms are defined in the five sub-glossaries: printing and prepress, converting and manufacturing, packaging materials, testing, quality and defects and regulation, sustainability and trade. The full index is in the packaging glossary.

Next step: send a specification the production chain can use

A quotation is only as reliable as the specification behind it. Before you request one, collect what each stage of the chain needs:

• Product type and construction, with a dieline or sample if you have one
• Internal dimensions, and the food or contents the item must hold
• Material or performance target: grade, grammage or thickness, barrier, recycled content
• Print: number of colours, colour references, inside or outside print, finish
• Quantities per design and size, and expected repeat frequency
• Food-contact use, temperature, grease and moisture conditions
• Destination markets, so compliance markings and documents are included
• Packing, pallet and delivery requirements, and the Incoterm you prefer
• Tests and acceptance criteria you expect, and whether you will use third-party inspection

Start from the product hub for your item, read the family production guide that matches it, and send the specification with artwork or brand guidelines through the contact page. The production route, tooling and test plan for your item are confirmed at quotation and technical review.

Related reading

• How paper bags are made
• How paper cups and food containers are made
• How folding cartons and takeaway boxes are made
• How corrugated packaging is made
• How plastic bags are made
• How flexible pouches are made
• How greaseproof wraps and printed napkins are made
• Paper barrier coatings
• Packaging paper grades explained