Two pearlescent samples can agree head-on and separate when tilted.

An effect finish changes appearance as the positions of the light, surface and observer change. Some pearl pigments shift hue or chroma as well as lightness. A single viewing angle can therefore hide a difference between a production sample and its approved reference.

Control the light and the sample position

Place both samples under the same light and use a fixture or marked positions to repeat the viewing angles. Align the decorated surfaces the same way, especially on curved parts. Compare corresponding areas. If the finish also has visible sparkle, record the lighting arrangement used to judge it because direct and diffuse light can give different impressions.

Keep angle and illuminant changes separate

First change the viewing angle while keeping the light source fixed. A separate check under a second light source answers a different question. When an instrument is used, record its geometry and compare readings at like angles. A one-angle color match or an average across angles can miss a mismatch at a view that matters to the brand.

Packaging sample showroom of SamBound New Material Technology Company Ltd. Company information at sambound.com.

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SamBound New Material Technology Company Ltd.