| 1 | Prepress file and plate checks | Checks for file integrity, page size, imposition, resolution, fonts, separations, and plate output settings before production. | Request a preflight report and confirm that the approved file version is recorded. | Finding file or setup issues before imaging can reduce plate remakes and press delays. |
| 2 | Accurate CTP plate imaging | Computer-to-plate imaging matched to the agreed plate type, screening, resolution, and job specifications. | Ask for the plate specifications and a documented imaging or quality-control procedure. | Consistent imaging supports reliable reproduction of text, fine lines, and screened tones. |
| 3 | Plate processing and handling | Controlled processing, cleaning, storage, and identification of plates, with handling appropriate to the plate material and process. | Review the supplier’s handling procedure and confirm that plates are labelled by job and color separation. | Careful processing and handling help prevent contamination, damage, and mix-ups. |
| 4 | First-off press proofing | Where required, a trial impression or press sheet made from the actual production plate and agreed press setup. | Confirm whether the proof is produced on press and whether paper, ink, and press conditions are recorded. | A press proof can reveal interactions among the plate, press, ink, and substrate that a screen preview cannot show. |
| 5 | Contract proofing support | When a press proof is not practical, a calibrated contract proof made to an agreed production condition. | Ask for the proofing condition, calibration status, and any control strip or measurement report supplied with the proof. | A controlled contract proof gives stakeholders a consistent visual reference, but it is not the same as a proof printed from the actual production plate. |
| 6 | Color measurement and evaluation | Objective measurement of color where specified, using suitable instruments and agreed measurement conditions. | Check that measurement records identify the instrument, measurement condition, target, and result. | Measured data can make color approval more repeatable than visual judgment alone. |
| 7 | Viewing conditions | Visual proof inspection under consistent, appropriate lighting; ISO 3664 specifies viewing conditions for graphic technology and photography. | Ask how proofs are viewed and whether the viewing environment follows a documented standard or agreed customer requirement. | Lighting affects how printed colors appear and can influence approval decisions. |
| 8 | Print-process control knowledge | Understanding of the relevant printing process and its control requirements; ISO 12647-2 addresses process control for offset lithographic printing. | Ask which process standard or customer specification is used for the job and how conformance is recorded. | Proofing is more useful when its targets and evaluation reflect the intended production process. |
| 9 | Proof approval and traceability | A clear approval workflow linking the proof to the job number, file version, plate set, date, and authorized approval. | Request a sample approval record and confirm how revisions and reproofs are tracked. | Traceability helps prevent an unapproved revision or incorrect proof from being used for production. |
| 10 | Turnaround, communication, and delivery | Agreed lead times, clear escalation contacts, secure handling of files, and suitable packaging and shipping for physical plates or proofs. | Confirm service terms, proof dispatch options, packaging practices, and procedures for resolving defects or delays. | Reliable coordination is important when proof approval is on the critical path to printing. |