Overview
CEN ISO/TR 11594:2022 - "Best practices for the creation/evaluation of fingerprint analysis in accordance with the ISO 28199 series" is a technical report that supplements the ISO 28199 series. It provides technical descriptions of X‑Y measuring tables (scanners) and practical guidance for creating and evaluating standardized test panels used to assess coating process compatibility. The report focuses on both visual and metrological evaluation methods and supplies sample applications, measurement presentation examples and recommendations for laboratory practice.
Key Topics
- X‑Y measuring tables: technical descriptions, measurement strategies and sample graphical presentations of measured quantities.
- Standard test panels (FAS panels): guidance on dimensions, substrate preparation and application methods to produce predictable, process‑representative panels.
- Film thickness wedges: purpose and coverage of film thickness ranges to simulate series coating processes; methods for creating wedges including dynamic path distance, variable paint flow quantity and changing tip velocity.
- Optical and metrological measurements: use of film thickness devices, colour‑measurement devices, surface‑structure and mottling measurement instruments; role of film thickness measurements as a control parameter.
- Visual evaluation: recommendations for illumination chambers and lighting compliant with ISO 3668, items of equipment (fluorescent, halogen, daylight lamps) and process steps for standardized visual assessment.
- Equipment, monitoring and software: current state‑of‑the‑art measuring devices, monitoring of test equipment, and data‑handling/software considerations.
- Interlaboratory results and quality: reporting on precision from interlaboratory testing and general quality requirements for panel creation and evaluation.
- Historical context: evolution from EUCAR and DIN 55993 work into ISO 28199.
Applications
- Automotive paint development and approval: early demonstration of process compatibility for new base coats and clear coats.
- Coating process simulation and R&D: laboratory simulation of high‑rotation bell application or other spray technologies to predict series behavior.
- Quality control and supplier qualification: objective metrological and visual tests to validate coatings before series use.
- Laboratories and standards bodies: use by paint laboratories, OEM technical teams, coating suppliers, metrology labs and test facilities.
Who should use it
- Paint and varnish formulators and manufacturers
- Automotive OEMs and bodymakers involved in paint approval
- Coating laboratory technicians and metrologists
- Quality assurance and R&D teams in surface finishing industries
Related Standards
- ISO 28199 series (primary series on fingerprint panels and process prediction)
- ISO 3668 (visual assessment illumination)
- Historical reference: DIN 55993 series / EUCAR project outputs
This technical report is practical for anyone needing standardized methods for creating, measuring and visually evaluating coating “fingerprint” panels to ensure reliable process compatibility and objective coating assessment.
