Glossmeters are instruments that measure the reflective qualities of manufactured surfaces. They work by shining a light of known intensity at a surface and measuring the specular reflectance.
GLOSS MEASUREMENT GUIDE
The human eye is the best tool to evaluate gloss differences. However, conditions vary and people see and judge differently. Gloss meters provide a reliable and practical way to define appearance with objective, measurable criteria. Accurate measurement of gloss improves quality and optimizes manufacturing processes.
Glossmeters work by shining a light of known intensity, and at a specific angle, at a surface and then measuring the specular reflectance. Smooth and highly polished surfaces reflect images distinctly, and on rough surfaces the light is diffused and scattered. To obtain a clear differentiation over the complete measurement range from high gloss to matt, different geometries are used. The angle of illumination chosen is dependant on the type of surface to be measured. The complete measurement range is covered by 20 degree (High gloss), 60 degree (Medium or Semi Gloss) and 85 degree (Low Gloss) glossmeters.