The Honest Proof Approval Checklist Before You Sign Off

What a proof approval actually commits you to

A proof is a checkpoint, not a guarantee. When you sign, you are usually confirming that the content, layout, color intent and structure shown on that specific proof match what you meant to order at that stage of the job. You are not confirming that the package meets a retailer requirement, a regulatory requirement, or that every unit off the press will look identical to the sheet in your hand.

The useful question before you sign is not whether the proof looks good. It is whether the proof shows the decisions you are actually responsible for. Ask your converter which items the proof locks and which remain open, because that answer changes what you should inspect closely and what you can leave to them.

Keep the approval specific. Approve the artwork revision number, the dieline revision, the color reference and the substrate named on the proof. A vague approval of a file name creates ambiguity later when someone asks which version was signed.

• Confirm the revision number printed on the proof matches the file you reviewed.
• Confirm the substrate and finish named on the proof match the order.
• Ask which changes after approval would require a new proof and which would not.
• Record who approved, what they approved and when, in writing.

Check the file before you check the picture

Preflight comes before aesthetics. Fonts should be embedded or outlined as your converter prefers, images should carry enough effective resolution at final print size rather than at screen size, and transparency should be handled according to the agreed workflow. Industry associations recommend PDF and PDF/X for exchanging packaging and label jobs, and PDF/X-4 is a common exchange format. That does not mean every file must be converted to CMYK before sending. A PDF/X-4 file can carry color managed RGB, and the conversion path is set by the workflow you and your printer agreed.

Printer marks, dieline visibility, layer naming and the type of proof supplied should follow the converter's instructions rather than a rule you found online. If you are unsure whether the dieline should be visible on the approval proof, ask. A visible dieline on a soft proof is a review aid, not an instruction to print it.

Check black elements in the file's separations or output preview rather than judging their ink builds by appearance alone. Registration black outputs on all separations and belongs in printer-specified registration marks, not ordinary artwork. Rich black uses a combination of process inks for a black appearance. Ask the converter to confirm appropriate builds for large solids, small text and fine rules under the agreed print process.

Barcodes: quiet zones and contrast at final size

Barcodes deserve their own pass because they fail quietly. GS1 guidance describes quiet zones as a mandatory component of most barcode designs, defined within GS1 and ISO specifications, and its 2D barcode playbook notes that insufficient quiet zones are one of the most common causes of 2D scan failure. GS1 says the quiet zone should remain free of text, including human readable interpretation, and free of graphics. It should also stay conformant after die lines, trimming, laminating, varnishing and package forming, not just in the digital file.

Color matters as much as geometry. Most retail and many industrial scanners use red illumination. As a result, red, orange, yellow or some metallic inks used as dark modules may appear effectively invisible to the scanner. GS1 also advises avoiding pastel or dot screened modules. Its best practice recommendations point toward dark symbols on light backgrounds, matte rather than highly reflective surfaces, and strong contrast against surrounding graphics.

Confirm that the encoded data and any human readable text match the approved product record. Review the symbol at final print size, using a correctly scaled print or measurement tool rather than relying on screen zoom. Obtain the applicable symbol, size, quiet-zone and verification requirements from the channel and converter; this guide does not supply those specifications. Ask how print quality will be verified after finishing. A successful test scan alone is not barcode verification, and a flat proof does not establish performance on a formed package.

• Measure the clear space around the symbol on the proof at final size and compare it with the symbol specification you were given.
• Check that no text, logo, cut mark or package edge enters the clear space.
• Prefer dark symbols on light, matte backgrounds, and confirm that the selected colors and finish suit the applicable symbol and scanning environment.
• Ask for verification on a finished sample, not only on a flat proof.

Color: what the proof can and cannot tell you

Ask what kind of proof you are looking at before you judge color. On plate based workflows, a named spot color typically gets its own ink plate. On many digital presses and proofing devices, spot colors are emulated with process or extended gamut inks unless that specific ink is loaded, so ask your printer how they handle it. Adobe PDF Print Engine emulates spot colors on proofing devices and on extended color gamut presses, and can extract spectral color data for conversion and color management. That is genuinely useful, but it means a spot color on a contract proof is usually a simulation of an ink unless the proof was produced with that actual ink.

So the honest question is not whether the spot color looks right on screen. It is whether the proof you are approving was made with the real ink, with a simulation, or is a soft proof. Each of those supports a different level of confidence, and your converter can tell you which one you have.

Also check the small stuff that proofs reveal badly: fine reverse type, thin rules, and small text knocked out of a dark background. These are the areas where a proof at final size is more informative than a magnified screen view.

Structure and dieline review

If the package is corrugated, the FEFCO code gives you a shared vocabulary. It is an internationally applied system for corrugated packaging design that assigns a code number to each common box design, and it is published in numbered editions, currently the 12th. Recording the FEFCO code, the code edition and the converter's dieline revision in your approval reduces misunderstanding about which design and drawing was signed.

Do not assume that flat panel dimensions equal finished internal dimensions. Board caliper, score geometry, folding and construction affect the relationship between the flat layout and the formed package. If fit matters, confirm the formed internal dimensions and agreed tolerances with the converter, and consider a structural sample.

Confirm the status and intended use of each structural drawing with the converter. A simplified rectangle with fold lines may help review panel order and rough proportion, but it does not establish manufacturing details or tolerances. Use the converter's approved production dieline and agreed dimensional specifications for production approval.

A worked example using simplified geometry

Suppose you are reviewing a simple open sleeve with four body panels and a glue flap. This is a simplified geometry exercise, not a production dieline, and it has no tuck flaps. The front panel is 120 mm, each side panel is 60 mm, the back panel is 120 mm, and the glue flap is 15 mm. The sleeve height is 180 mm.

Add the widths across the flat: 120 plus 60 plus 120 plus 60 plus 15 equals 375 mm. Multiply by the height: 375 times 180 equals 67,500 square millimetres, which is 0.0675 square metres per sleeve. For 1,000 sleeves that is 67.5 square metres of board before any allowance.

Now add a hypothetical 5 percent allowance for make ready and trim: 67.5 times 1.05 equals 70.875 square metres. At a hypothetical board cost of 0.90 currency units per square metre, which is invented for this example and is not a quote, a Teal price or a market benchmark, the material comes to about 63.79 units for 1,000 sleeves, or roughly 0.064 units per sleeve. That is arithmetic only. It ignores caliper, scoring waste, printing and finishing, and it is not a validation of anything.

In this hypothetical example, changing both side panels from 60 mm to 65 mm while keeping the other dimensions unchanged increases the flat width to 385 mm. The area becomes 69,300 square millimetres per sleeve, about 2.7 percent greater than the original area. With the same hypothetical allowance and board rate, the material estimate also rises by about 2.7 percent. Actual sheet yield and manufacturing costs need separate converter calculations. Reviewing dimensions before production can help avoid rework.

Which proof to request for which change

Proof type should follow the converter's process, but the table below is a reasonable way to frame the conversation. Use it to ask better questions, not to overrule your converter.

The pre signature checklist

Work through this list in order and note the answer to each item. If an item cannot be answered, that is the item to raise before signing rather than after.

• Revision number on the proof matches the file and dieline you reviewed.
• Substrate, caliper and finish on the proof match the order.
• Fonts, images and transparency preflighted under the agreed workflow.
• Barcode data checked against the approved product record; final-size symbol and quiet zones checked against applicable specifications, with clear space free of text, graphics and cut marks.
• Barcode verification planned on a finished sample, not only a flat proof.
• Proof format, substrate representation and color-rendering method recorded, including whether spot colors are simulated or printed with the intended ink.
• Registration black and rich black used where each was intended.
• Dieline revision recorded, plus a shared style code such as a FEFCO code where one applies.
• Formed internal dimensions confirmed if fit matters.
• Approval recorded in writing with name, date and the exact items approved.

Scope limits for this checklist

This is an editorial planning framework for reviewing proofs, not a compliance determination. The sources cited cover specific underlying principles such as quiet zones, spot color emulation and corrugated design coding. They do not certify any package, and Teal does not certify packages either.

If your product is a household substance that may fall under special packaging requirements, proof approval is not the same as compliance. The CPSC states that it does not perform pre market approval of special packaging and does not approve, certify or endorse any specific package or design, and that certification of a special package is done by the manufacturer of the end product. Treat that as a separate workstream with its own review questions.

Retailer and channel requirements change and are governed by your own agreements. Confirm barcode, labeling and packaging requirements directly with the channel rather than relying on a general guide.

Questions about proof approval review before sign off