60° Gloss (Aesthetix)
Parameter description
Definition: Gloss refers to the overall shiny appearance of a surface when light is reflected directly off it. It is often measured using glossmeters which quantify the amount of reflected light at specific angles.
Importance: Gloss is the most widely used measure of a surface's ability to reflect light in a specular manner, contributing to its shiny appearance.
High gloss values indicate bright, mirror-like finishes, while low values indicate matt or dull surfaces.
How is it measured?
Aesthetix specular light source (1) projects a controlled light beam onto the surface (2) at 60° and captures the reflected intensity with the gloss camera (3).
The optical layout of the gloss sensor
The signal is compared to a calibrated reference standard and expressed in gloss units, measurements comply to ISO2813 & ASTM D523, the recognised standards for gloss measurement.
**Specular reflection from a calibration standard captured by the gloss camera. To comply with the angular tolerances in the standard, light in the yellow area is integrated. **
Applications
Routine control of high-gloss, semi-gloss and matt coatings in automotive, furniture, plastics, packaging and consumer goods.
Verifying that production parts match master panels or customer specifications for gloss level before shipment.
Technical specifications
| Item | Specification / Value |
|---|---|
| Gloss index | 60° Gloss (all Aesthetix modules that report gloss) |
| Gloss unit | GU (Gloss Units) |
| Measurement geometry | 60° specular gloss geometry |
| Field of view (FOV) | 18 × 24 mm |
| Standard analysed gloss area | 18 × 9 mm |
| Optional small gloss spot | 4 × 2 mm |
| Other analysed areas (modules) | Effect Finish: 10 × 10 mm; Texture: up to 15 × 15 mm; Polishing Quality: 10 × 10 mm |
| Surface resolution | 9.2 µm/pixel (109 pixels/mm) |
| Repeatability, 0–10 GU | ±0.1 GU |
| Repeatability, 10–100 GU | ±0.2 GU |
| Repeatability, 100–1000 GU | ±0.2% of reading |
| Reproducibility, 0–10 GU | ±0.2 GU |
| Reproducibility, 10–100 GU | ±0.5 GU |
| Reproducibility, 100–1000 GU | ±0.5% of reading |
These repeatability and reproducibility values assume correct calibration on a certified gloss tile, stable environmental conditions and consistent sample positioning and measurement practice.