Color and Gloss Difference Measurement

The inspection of visual parameters, such as gloss and color, plays a crucial role in the final evaluation and aesthetic appearance of a product.

Gloss is measured by reflecting light off a surface using glossmeters. There are various models, including tri-angle (20°-60°-85°), mono-angle (60°), and versions designed for small or curved surfaces, ideal for measuring specific parts and pieces. Glossmeters are used in many industries, including printing, paints, plastic coatings, wood, marble, glass, ceramics, metal surfaces, and metal polishing.

Color inspection is carried out with colorimeters and spectrophotometers. Colorimeters measure chromatic variations (Delta E) between samples, while spectrophotometers provide a comprehensive color analysis, checking spectral curves and metamerism. Metamerism refers to how two objects of the same color appear different under different light sources, a critical factor in industries such as automotive, textiles, electronics, food, and cosmetics.

A color matching cabinet or booth is used for visual color evaluation under different light sources. Inside the light booth, the walls absorb light, ensuring natural illumination of the sample being analyzed.

To measure the whiteness of a sample, a whiteness meter is used, while reflectance meters measure the light refraction value on a surface.

These tools are digital, portable, and ideal for field use. For example, colorimeters are commonly used in quality control for materials such as plastics, metals, paints, and coatings, ensuring quick and precise results.