Metallic Paint Colour Travel: A Single Viewing Angle May Miss the Difference

The key distinction

BYK's multi-angle measurement approach reflects the need to assess colour and effect appearance from more than one geometry. In a workshop, the first useful step is to document the actual viewing conditions of the complaint. A single photograph or instrument reading should not be treated as a complete description of an effect finish.

Practical checks

1. Identify the finish and the angles at which the difference becomes visible.
2. Keep lighting, panel position and viewing geometry consistent between comparisons.
3. Ask a qualified evaluator which measurements are appropriate for the effect being assessed.

Example

Illustrative example: two adjacent panels appear similar head-on but differ when viewed obliquely. The mismatch should remain part of the inspection record even if a straight-on image looks satisfactory. The evaluation needs to reproduce the owner's observation before deciding what caused it.

Scope and limits

Do not assume a coating caused or can correct an effect-paint mismatch without evidence. Refinish history and the underlying finish remain relevant. This guide does not authorize polishing or recoating a panel solely to force agreement at one viewing angle.

Related guidance

• Light Colour Temperature and Defect Visibility in Paint Inspection
• Coating Colour Difference: State Which Delta E Formula Was Used
• Coating Colour Measurements on Small Parts: Match the Aperture to the Target
• Micrometres and Nanometres in Coating Reports: Check the Scale

Technical references: BYK: Multi-angle colour and effect measurement. These sources describe their stated methods or products; they do not certify NANOLAB products or establish compatibility with an unlisted surface.

Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.