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Coating Colour Checks: Read the Direction of Change, Not Only Delta E
A single colour-difference value describes magnitude but does not explain the direction of the change. Component differences provide additional context.
Updated · NANOLAB Knowledge
Practical approach
Review lightness and colour-coordinate changes alongside the total difference and visual assessment.
Two samples can have similar total differences while one becomes lighter and another shifts in hue.
Decision limits
Do not describe every equal Delta E value as the same appearance change.
Related guidance
- Lint Checks for Coating Towels: A Small Trial Before Installation
- Foam Cannons on Coated Cars: What Foam Does and Does Not Do
- Colour Checks After Coating: Separate Lighting from Surface Change
- Coating Samples and Metamerism: Compare Under Relevant Light Sources
Method reference: Konica Minolta: colour differences. References 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.
Continue reading
Lint Checks for Coating Towels: A Small Trial Before Installation
Towel lint can complicate coating levelling and inspection. Check the towels intended for the job before opening the coating bottle.
Foam Cannons on Coated Cars: What Foam Does and Does Not Do
Use foam as part of a suitable pre-wash process without assuming thick coverage proves complete cleaning or makes all contact safe.
Colour Checks After Coating: Separate Lighting from Surface Change
A perceived colour difference can depend on the light source and viewing conditions. Repeat the observation before assigning it to the coating.