Artwork Files for Packaging: What Factories Need

Artwork is the only part of a packaging programme that a brand can control completely & still get wrong. The file looks finished on a screen, the copy has been approved internally, the colour reads correctly on a laptop, & then the printed carton comes back with the ingredient list clipped at the fold, the logo in a substitute font & the gold a flat mustard. Nothing about the formula caused that. The file did.

This article sets out what a factory & its printer need from an artwork file: the dieline, bleed & safe zones, how fonts should be supplied, what a colour proof can & cannot show, the resolution & barcode checks, what the label copy has to carry, how many proof rounds to expect, & how version control keeps the right file on the plate. It is written for the brand team that owns the file rather than for the designer who drew it. Print & finish options are covered in our guide to colours, finishes & print techniques, & the copy itself is discussed in our labelling guide by market.

Why artwork fails at the plate stage

Artwork fails late because the mistakes are invisible until something physical exists. A missing bleed does not show on a screen. A font that the output device does not hold is substituted silently at the rip. A colour built from four process inks looks acceptable on a monitor & prints as a muddy approximation of the spot colour it was meant to imitate. Each failure is only visible once ink is on substrate.

The cost structure makes lateness expensive. Artwork errors are discovered at the point where plates, cylinders or screens already exist, so the correction cost is not the cost of a file edit but the cost of a remake plus the lost slot in the print schedule. A brand that finds the error after the run has been filled has a bigger problem than a printing one.

The practical answer is to handle artwork as a specification with its own acceptance checks rather than as a creative deliverable. The checks are simple, they are known in advance, & running them before the file leaves the brand costs an hour. Running them after the plate is made costs the launch window.

The dieline: one file, one truth

A dieline is the printer's template: the cut line, the fold lines, the glue flap, the panel boundaries & the safe margins, supplied as a separate layer in the artwork file. It describes the pack that will actually be made, & it is the reference every other decision is measured against. Artwork built on the wrong dieline is wrong in a way no proof round will fully rescue.

Dielines carry revisions. A carton that was re-engineered for a board thickness, a label resized for a different bottle, a sleeve redrawn after a mould change: each produces a new revision, & the brand's designer is often working from the original. The first check on any file is whether the dieline revision in the artwork matches the revision the converter is tooling for.

Two rules prevent most of the rest. Keep the dieline on its own layer & keep it locked, so nobody nudges it while aligning a logo. Supply the artwork in layers rather than flattened, so the printer can switch a spot channel or adjust a varnish without rebuilding the file from scratch.

Bleed, trim & the safe zone

Bleed is the extension of the artwork past the cut line, so that a cut registering a fraction off centre still leaves colour at the edge instead of a white sliver. Trim is where the blade lands. The safe zone is the margin inside the trim where text & critical marks must stay if they are not to be shaved or creased.

The two failures are predictable. A background that stops at the trim leaves white edges wherever the cut drifts, which on a dark pack is visible from across a shelf. Text placed too close to a fold or a trim loses its descenders to the crease, which on an ingredient list is a compliance problem rather than an aesthetic one.

The values are the converter's to name, not the brand's to guess. Different board grades, different label materials & different cutting methods carry different tolerances, & a printer asked for a specific allowance will give one. The brand's job is to confirm the allowance in writing & then check every panel against it before release.

Fonts: outlines, licences & small type

Font is the most common silent substitution in print. If the file carries a live font the output device does not hold, the rip replaces it with something it does have, & the proof may still be produced from a machine that does have it. The brand approves a proof set in the right typeface & receives a run set in another.

The two accepted routes are converting type to outlines or curves so no font file is needed at output, or embedding the font in a print-ready file. Both remove the substitution risk. Outline conversion removes the ability to edit the text afterwards, which is why the version control discipline below matters: the editable master stays with the brand & the outlined file goes to print.

Font licensing is the question brands forget. A typeface licensed for desktop use may not be licensed for supply to a third-party printer, & the brand is the party that agreed to the terms. Where a brand builds a range on a licensed face, checking the licence covers commercial print supply is a five-minute task that avoids an awkward letter.

Small type deserves separate attention. Ingredient declarations, usage instructions & warnings are the longest & smallest text on the pack, & they are also the text a regulator or a retailer reads first. Thin strokes reversed out of a dark background, tight tracking & a size chosen to fit a panel rather than to be read are the three habits that make a compliant copy technically present & practically illegible.

Colour modes & what a proof can show

Screens emit light & print reflects it, so an artwork prepared in a screen colour mode will not translate. Files destined for print should be prepared in the process colour mode the printer names, with any spot colours declared as separate channels rather than simulated from the process set. A brand that hands over a screen-mode file has handed over a guess.

Proofs differ in what they can promise. A layout proof shows position, copy & hierarchy, & is the right round for catching a misplaced claim or a missing symbol. A colour proof produced on the printing process, or on a calibrated device matched to it, shows whether the colour will land. A proof on the actual substrate, with the actual finish, shows what the customer will see.

Approving the wrong round is the recurring mistake. A brand that approves colour from a desktop print has approved nothing, because the device was never matched to the press. A brand that skips the substrate proof has not seen the effect of varnish, lamination, foil or the absorbency of an uncoated board, each of which shifts the result.

Line art, resolution & barcodes

Logos, icons & type should be vector, so they scale to a carton or shrink to a sachet without degradation. Photographic or rendered elements are raster, & their resolution must be sufficient at final printed size, not at the size they happen to be placed in the file. An image exported from a website is almost never adequate for print.

The check is simple & worth running panel by panel: place every raster element at one hundred per cent of its printed size & look at it. Soft edges, visible pixel structure or a loss of fine detail in a gradient are all signs the asset needs to be re-supplied rather than enlarged.

Barcodes fail differently. They are generated to a size & a tolerance, & stretching one to fit a panel changes the bar widths enough to make it unreadable at a till. The brand should ask the printer to generate the symbol at the correct size, keep a clear quiet zone around it, & verify a scan on the printed pack before the run is released.

What the label copy has to carry

The copy is the part of the artwork the brand cannot iterate after launch. Depending on the market, a cosmetic label is expected to carry the product name & function, the ingredient declaration in the naming convention that market uses, the net contents, the name & address of the responsible party, a batch code, & any warnings or use instructions the market requires. The exact list is a matter for the market's rules rather than for this article.

The practical point for artwork is that this text is written last & designed first. A panel sized for a short ingredient list does not accommodate the full declaration once the formula is finalised, & a bilingual or multi-market layout doubles the space the same content needs. Sizing the copy block from the final formula rather than from the concept avoids the most common late redesign.

Consistency across components is the other trap. The carton, the label & any insert must agree: same product name, same declared contents, same batch code format, same responsible party. A mismatch between carton & primary pack is the kind of finding that turns a routine inspection into a withdrawal, & it is entirely preventable inside the artwork file.

Proof rounds: what each round is for

Three rounds is a normal expectation for a new pack, & each has a job. The first is layout & copy: position, hierarchy, completeness of the mandatory text, barcode placement & the agreement between components. The second is colour & finish: spot colours separated correctly, metallics behaving, varnish & lamination applied where intended. The third is the production reference: a printed sample or a press-approved first-off.

Brands lose time by collapsing the rounds. Asking for a colour decision at the layout stage produces a change of mind later, because the brand has not yet seen the substrate. Asking for copy changes at the colour stage reopens a round that was meant to be closing. Sequencing the rounds costs nothing & prevents the loop.

What should come back from each round is a marked-up proof & a written approval, not a verbal agreement over a photograph. A photograph of a carton on a desk does not show the fold, the crease or the colour under retail lighting, & it is not a document anyone can refer to six months later.

Substrate & finish change the colour

The same ink on coated board, uncoated board, metallised film & a clear label produces four different results. Uncoated stock absorbs ink & drops density, so a colour matched on a coated proof reads lighter & duller on the pack. A clear label over a dark product changes the apparent colour of every element printed on it unless a white underlay is specified.

Finishes move the result again. A matt varnish flattens density, a gloss varnish deepens it & a soft-touch coating can mute a fine detail. Foil blocking is a spot process with its own channel & its own registration tolerance, & embossing needs artwork that accounts for how the raised area catches light rather than how it looks flat on a screen.

The control is to proof on the production substrate with the production finish, or to accept a documented limitation in writing. A brand launching into premium retail should not accept a limitation on a metallic or a deep colour, because that is exactly the element the shelf presentation depends on.

Version control & the file that gets printed

Every packaging programme produces more files than anybody expects: concept files, revised files, legal-copy files, market variants & the printer's own imposed file. Without control, the file that reaches the plate is whichever one was attached to the last email, & that is frequently not the one that was approved.

The minimum discipline is a revision number in the file name, a change log listing what moved between revisions, & a single named person who releases files to the printer. Where a brand runs market variants, each variant is its own file with its own revision, not a copy of a master with a different language pasted in at the end.

Legal copy is the usual cause of a late change. A claim is revised, an ingredient name is corrected, a responsible party address moves, & the artwork has to be re-released. Building a window for that into the schedule, rather than regarding the first approval as final, is what keeps a late correction from becoming a late launch.

Artwork checks at a glance

The table below sets the checks worth running before release against what goes wrong when they are skipped, what the failure costs, & what to ask the printer or converter. The rows are a working list rather than a fixed standard; the allowances, colour separations & proof expectations depend on the substrate, the process & the converter, & should be confirmed with them in writing.

The rows are a starting list, & the right set is matched to the pack & the process rather than copied from a generic checklist. A brand that runs these checks before release buys its proof rounds for colour & finish decisions rather than spending them on preventable errors, & that is where the time in a launch schedule is actually saved.

What to put in the brief

Say which components the artwork covers, because a carton, a primary label & a sachet are separate files with separate dielines & separate tolerances. Say which markets the pack serves, since the copy block & the language count follow from that. Say who inside your team releases files to the printer, & confirm that person is named on the project rather than implied.

• The components covered, with the dieline revision for each.
• The markets served, & the languages the copy has to carry.
• How type is supplied: outlines, embedded fonts, or a named licensed face.
• The colour build: process mode, spot channels, metallics & white underlays.
• The substrate & finish, with proofing on production material confirmed.
• The proof rounds expected, & what each round is approved against.
• The barcode requirement, including size, placement & scan verification.
• The release procedure: revision numbering, change log & named approver.

Then agree the change window. A date after which copy changes are handled as a re-release rather than an edit protects the print slot, & naming it early is fairer to everyone than discovering it when the claim wording is still moving.

Where our capability fits

We supply the dieline for the components we run, we state the bleed & safe zone allowances in writing, & we check the incoming file against them before it goes to plate. Where a brand supplies finished artwork, we report what we find rather than quietly correcting it, & where a brand needs the artwork built, we work from the approved copy & the market list to produce a print-ready file with the separations the converter needs.

We work with brands on private label (your brand on a proven base), OEM/ODM contract manufacturing & full custom formula development, & the artwork discipline is the same across all three. Our lines include amber glass dropper serum bottles, a golden amphora perfume spray & a hydrating facial serum dropper bottle, each packed under the same proof & approval routine.

Tell us the pack, the markets & the finishes you have in mind, & we will come back with the dielines, the allowances & the proof rounds the job needs. Start at our inquiry page, email capsulebiotech@163.com, or message the right team on WhatsApp: Capsule Series (capsules only) +86 158-7655-5319, Cosmetics Series (serum, hair care, body care, fragrance) +86 158-7655-5319.

General manufacturing information, not regulatory or legal advice. Label content, mandatory copy & the wording required in each market are set by the applicable rules, & the requirements for a given product & destination should be confirmed with the competent authority & a qualified professional before printing.