Artwork for a glass bottle is approved in six rounds, signed in a fixed order by design, regulatory, supply chain and the print supplier, and most projects close in three to four revision cycles once the container, the decoration method and the destination market are settled. A digital proof governs content, structure and version; a physical sample governs colour, finish and how the print behaves on glass. Production runs from one released master file, backed by a retained sample that both sides hold.
Separate mould decisions from artwork decisions first
Only what is applied to the bottle after forming counts as artwork. Everything formed in the mould is a tooling matter, and no signature on a print proof can settle it. Mixing the two is the commonest reason an approval has to be run again.
Mould-side decisions are the body and shoulder shape, capacity, neck finish and thread family, the push-up or punt in the base, and any embossed or debossed detail. Embossing is the one that gets mistaken for a graphic. A logo in relief needs a minimum height to stay legible, changes the wall thickness, needs a draft angle so the parison can release, and looks nothing like ink. Negotiate it on the drawing and judge it on the retained sample from the mould trial.
Applied-side decisions fall into three routes, and each needs its own confirmation even when one graphic runs across all of them:
- Labelling: self-adhesive, wet-glue paper, wraparound, or a shrink sleeve.
- Direct decoration: screen print, digital print, hot stamping, frosting, or several combined.
- Surrounding pack: folding carton, sleeve, gift box, divider or shipper.
File requirements, colour behaviour and tolerance for fine detail differ between the three. What each on-glass process can physically reproduce is a separate subject, covered in our guide to decoration methods and their limits on glass.
Two content types that need a named owner
Mandatory text sits in the file like any other graphic but carries legal weight in the market: net content, ingredient or material statements, warnings, batch and best-before fields, recycling and material identification marks, country of origin, and whatever else the destination requires. Machine-readable data is the second type: the barcode with its symbology, magnification and quiet zones, plus variable fields such as a lot code, a serialised identifier or a QR destination. Approvals stall on these two more than on anything visual, usually because nobody was assigned to them.
Why the method comes before the proof
Ask for a decoration quote before artwork exists and the answer will be a range. Ask for a proof before the decoration method is chosen and the proof will be reissued when the method changes. Settle container, method and market up front; the fields of a bottle spec sheet show how to document those three decisions.
Who signs, and in what order
Approval is rarely a two-party exchange between brand and supplier. Four groups take part, and late projects are nearly always ones where a role surfaced late instead of being planned in.
| Order | Function | What it approves | Typical failure |
|---|---|---|---|
| First | Brand design or packaging development | Graphic composition on the real dieline: proportions, typography, clear space, colour intent, image placement, legibility at printed size | Signing off at monitor scale, on a generic template |
| Second | Legal or regulatory | Claims, mandatory statements, restricted terms, required symbols and the language rules of the destination market | Being consulted last, after the layout is frozen |
| Third | Supply chain or operations | Fit with the filling line, barcode scanning on the intended equipment, carton closure, case stacking, pallet count, achievable date | Signing a proof that is accurate but cannot be built at the required volume |
| Fourth | Factory or print supplier | Whether the file separates and outputs, colour match on the substrate, survival of detail, registration tolerance, completeness of the file | Quietly deciding a value or a line of text nobody approved |
Design should work on a dieline drawn to the actual container and see one physical output before calling the layout final. Layouts that look fine on screen often break once the wrap of a cylindrical label is accounted for, once a mandatory line shrinks below readable height, or where the leading and trailing label edges meet on a curve.
Regulatory review has no interest in aesthetics, and should not be asked for an opinion on them. Its timing matters more than anything else in the schedule: a finding that adds a block of text can force a re-layout of a label everyone else has signed. Bringing that reviewer in at the digital proof stage, before any physical sample exists, is the cheapest scheduling decision available.
Supply chain usually holds the supplier relationship, so it also turns the approved artwork into a purchase instruction. The print supplier reads last but its limits are physical. It should not be asked to design.
Run the sequence any other way and the proof ends up either visually finished but missing regulatory content, or regulatorily complete and impossible to print.
What a digital proof settles and what needs a physical sample
These are different instruments answering different questions. Treating them as interchangeable produces reprints and arguments.
| Digital proof | Physical sample | |
|---|---|---|
| What it is | A rendering from the file | A decorated object |
| Authoritative for | Dieline, element positions against edges and seam, exact wording, barcode data and quiet zones, layout hierarchy, spelling of every name and code, the version | Printed colour, opacity and coverage, gloss or matte level, texture, edge sharpness of small type and fine rules, look under the lighting of the sales channel, fit into carton or sleeve |
| Cannot show | Whether ink sits on glass without crawling, whether a warm grey stays warm under a given ink system, abrasion resistance in transit, whether a fine rule breaks on a curve | Anything beyond the conditions it was made under |
| Use for changes to | Content or layout only | Colour, coverage, finish, or the printed size of a fine element |
The file is also where the version gets frozen, because a file can be hashed, dated and stored without ambiguity and an object cannot.
A sample made on a different machine, from a different ink batch, or on a bottle out of another mould is evidence about that sample, not necessarily about the production run. Two habits prevent most disputes. Label every sample with its line, ink batch and date. Judge colour under a stated light source, not whatever the meeting room offers.
Write this boundary into the project plan. A buyer who releases a colour change on a reissued file has learned nothing about whether the change is achievable, and one who negotiates wording on a physical sample has no controlled record of the text. Both end up paying twice.
The six approval rounds
The rounds below are in running order. Skipping one does not remove its question; it pushes the question to a later stage where answering it costs more.
| Round | Participants | What is confirmed | Deliverable | What usually slips through | Record to keep |
|---|---|---|---|---|---|
| 1. Intake and dieline check | Brand design or packaging development; the supplier's tooling or prepress contact | Artwork is built on the real container dieline, with every element inside the printable or labelable area | Digital, drawn to the container drawing | A generic cylinder template, leaving wrap, seam and label overlap wrong | Dieline file and version, the container drawing or mould reference behind it, date of acceptance by both sides |
| 2. Print method and colour route | Brand design; the supplier's prepress or colour specialist; the decoration budget holder | Which process prints the job, how colour is specified, how the substrate shifts the intended colour | Digital: a colour-separated proof plus the colour specification | A colour reference given alone, with no ink system, substrate or viewing light | Colour reference and how it was specified, ink system, substrate, judging light, agreed tolerance for drift |
| 3. Regulatory and mandatory content | Regulatory or legal reviewer; brand supply chain; a supplier contact familiar with the destination requirement | Each mandatory statement for the market is present, complete, correctly worded and readable at printed size | Digital, on a proof carrying final wording | A mandatory item added after the layout freeze, forcing a re-layout and a fresh sample | Named market, checklist used, reviewer, clearance date, version cleared |
| 4. Barcode and variable data | Brand operations or ecommerce; supplier prepress; the owner of retail or logistics data | Symbology, magnification, placement, quiet zones, human-readable line; variable fields can change without touching fixed artwork | Digital, plus a printed verification scan on the same substrate where possible | A symbol that looks right on screen but has too little quiet zone or drops under minimum magnification on the container | Verification result with symbol grade or a written note of the method, numeric string, placement coordinate, margin left around the symbol |
| 5. Physical pre-production sample | Brand design and brand quality; the production or print operator; supply chain if the pack runs on a line | Printed colour, coverage and opacity, finish, sharpness of small text and fine rules, fit into secondary packaging | Physical, ideally off the intended production route and machine | Colour viewed in the wrong light, or a sample from another machine or ink batch | Sample identity, line and ink batch, date, light source used, counter-sample retained by each side |
| 6. Master freeze and production release | Brand supply chain as sole releasing owner; the supplier's planner | Exactly one file governs production, no change request is open, a retained sample exists | Signed master file and a physical retained sample | No frozen master, so the run follows the newest email attachment | Released file with version and any hash or checksum, retained sample reference, release date, written confirmation that the released version is the one in press |
Revision rounds and the version that governs
With container, method and market fixed, three to four rounds is the normal shape. A project that reaches seven or eight almost always has a structural question open underneath: an unsettled dieline, an undecided label or print route, a regulatory point nobody closed. Each extra round is then an attempt to design around something that needs a decision.
Three rules keep the loop finite:
- Number every version and note on it what changed and who asked, so the reason outlives the email thread.
- Name the governing version in writing. A file with a later date stays a draft until it is formally released. The costliest reprints come from a correct design overtaken by a draft nobody meant to release.
- Agree in advance what a round beyond the limit triggers, whether a schedule effect, a re-proof or a re-sampling. The terms are settled per project, and the point is that a further request becomes a deliberate choice.
What a late change requires
| Type of change | How it is validated |
|---|---|
| Content correction only | New digital proof |
| Layout move, same size and colour | Digital proof plus a pdf-based dieline check, with the print supplier confirming the elements remain inside the printable area |
| Colour, coverage or finish | New physical sample |
| Container dieline or decoration method | A new project, not a revision |
Treating the last row as a revision is how a buyer ends up holding a signed proof unrelated to the mould in the machine.
One master file, one owner
Keep the master in a single location under a single owner, and instruct the supplier to accept artwork from that person only, in a stated format. When three people at a brand send files in three formats, the wrong one eventually gets built. The supplier may not query it, because from where it sits every incoming file looks like something a customer wants printed.
Six failures and how each is prevented
The same events recur across projects. Knowing the consequence of each makes the upstream effort easy to justify.
| Failure | What happens | Consequence | Prevention |
|---|---|---|---|
| Silent supersession | Production runs from a version other than the released one | Full reprint or re-decoration, typically found at packing, not at printing | A single releasing owner and a written statement from the supplier naming the version in press |
| Missing mandatory item | A required statement, symbol, warning or language is absent | Reprint, and possibly goods that cannot lawfully be sold in that form: a commercial loss, not a quality defect | Clear regulatory content on the digital proof against a written market checklist before ordering a sample |
| Colour drift | The print is visibly off on shelf or in photos, yet fails no written criterion | A choice between accepting an off-brand pack and reprinting | State ink system, substrate and viewing light at the colour round; define an acceptable range, not one target |
| Illegible detail | A fine rule, small type or delicate logo edge survives the file but not the process | A decoration pass redone | Check the smallest element at true printed size on a physical sample |
| Scanning failure | The barcode verifies off a desktop printer and fails on the bottle through curvature, gloss, low contrast or a short quiet zone | Rejection or manual handling at a retailer or distribution centre, nearly always ending in a reprint | Verify on the actual substrate in the actual position |
| Ghost change request | A request raised in a meeting is never formally closed | An argument with no owner, which is worse than a defect | Close each request in writing against a version number, accepted or declined |
Illegible detail hides well on a digital proof, since a screen renders lines that no glass process reproduces at that size.
What the sign-off record contains
The record exists so that a later disagreement takes minutes to resolve and shows who decided what. A shared folder of badly named files does not do that. Neither does an email reading "approved", because it fails to say what was approved.
Six items are sufficient:
- The released master file with version and release date, plus a hash or checksum if the project uses one.
- The dieline or container drawing it was built to, so the artwork can be tied back to the mould.
- The colour specification as accepted, with ink system, substrate and viewing light.
- The regulatory checklist, naming the destination market and the reviewer.
- The retained physical sample, marked with line, ink batch and date, and held by both parties so neither copy can be dismissed as unrepresentative.
- The change log: every request, its outcome, and the version it entered.
Let commercial risk set the retention period. For a pack that will run for several years, or a brand system likely to change, holding the record for the pack's life plus a margin costs almost nothing and answers questions that would otherwise reopen with a new supplier. Where one graphic goes onto several containers or through several decoration methods, keep a record per container and per method. Colour behaviour, printable area and minimum detail size vary between them even from an identical source file.
What to send to get an approval schedule
Two facts shape everything else. The project type, meaning label, on-glass decoration, carton or sleeve, or a mix, determines file requirements, printable area, minimum detail size, how colour is specified and which rounds need an object instead of a file. The target market determines mandatory content, language and labelling rules; a schedule drawn up without it tends to have a regulatory round inserted later at greater cost.
Add three more inputs for a realistic plan: the container specification or drawing the artwork is built to, the intended decoration method, and the target quantity band with the date the pack must be on the market. From those we can lay out the rounds with participants named by function, flag which need a physical pre-production sample, list the mandatory items to confirm for that market, and note the dieline questions to close before layout is finalised and before tooling is committed.
If a project is already in difficulty, include the current version number, the change requests still open and what is on press. The first job then is to establish which released version governs, not to add another round.
Approval is the last of three steps. If the container is still undecided, start with the bottle and jar families in our range. If dimensions, tolerances, decoration and packing requirements are not yet written in a form a plant can quote against, see how a packaging specification is structured. Container, then specification, then artwork is the shortest path to a decoration file that holds up on a production line.
Frequently asked questions
Can a colour change be approved on a digital proof?
No. The file is the authority for wording, mandatory statements, dieline, positions and barcode data. Printed colour, coverage, gloss or matte level and the sharpness of small detail belong to the physical sample. A colour change signed on a file has not really been approved, and a wording change agreed on an object is not under version control.
Who in the brand's organisation has to sign?
Four functions in sequence: design for dieline and layout; regulatory or legal for statements, claims and restricted terms; supply chain or operations for feasibility, real-world barcode scanning, pack compatibility and schedule; then whoever holds the supplier relationship, who converts the approved version into a purchase instruction. Some brands add a fifth, marketing sign-off. That is fine provided it cannot reopen a point regulatory has closed, otherwise the loop never ends.
How many revision rounds are reasonable?
Three to four, once container, decoration method and market are fixed. More than that points to an open structural question, such as the label route, the dieline or a regulatory item, that needs a decision and not another layout.
Who is responsible for mandatory content in a regulated market?
The brand's regulatory function, working from a written checklist cleared before a sample is ordered. The list depends on market, product category and channel. It commonly includes net content, required ingredient, material or origin statements, warnings or age restrictions, recycling and material identification marks, a batch or lot field, and the local language requirement. The supplier's part is to confirm the text prints legibly in the space available and to flag a mandatory block that does not fit.
Can a barcode be approved from the file alone?
Its data and placement can: numeric string, symbology, human-readable line and position. The printed symbol cannot, because curved, glossy or low-contrast surfaces are exactly where scans fail at the till or in a distribution centre. Verify it on the real substrate in the real position and file the result with the symbol grade. Keep lot codes and serialised identifiers apart from the fixed artwork so they can change without reopening the approved version.
What settles a dispute when goods arrive printed to the wrong version?
The six-item record described above. With the released file, the drawing, the colour specification, the regulatory checklist, the jointly held sample and the change log in hand, the question becomes a comparison between documents instead of a reconstruction from memory.