20º / 60º / 75º Statistical Triple Angle Gloss Meter
- Measures 20º, 60º and 75º Geometries
- Simultaneous read of all 3 angles
- Full statistical analysis
- Suitable for measuring paper
The Novo-Gloss 20/60/75ºS gloss meter is a fully featured instrument measuring the gloss of surfaces. The 60º angle is a reference angle and can be used to measure any surface ranging from matt to mirror finishes. To accompany this, the instrument also has a 20º angle for more advanced measurement on high-gloss surfaces and 75º which gives an improved resolution on matt surfaces. With built-in statistical analysis and ‘move & read’ for the checking of larger surface areas, the instrument has all the features you will ever need for quick, accurate gloss measurement. The 60º can be used for measuring printed substances, the 20º gives an improved resolution on high-gloss coating and foil boards. The 75º is the standard measurement angle for gloss in the paper industry.
- Measures using the 20º, 60º and 75º geometry.
- Compatible with all important international standards.
- Full Statistical Analysis.
- Constant Read Feature.
- Auto-ranging, Measures Matt to Mirror Finish.
- Rechargeable Power supply.
- Extended two-year warranty.
- Accurate and reliable.
- Calibrate to any standard.
- User Serviceable light source.
Why Measure Gloss?
Gloss is a feature of visual perception that is as important as color when considering the psychological effect of products on a consumer. It has been described as ‘The attribute of surfaces that causes them to have shiny or lustrous, metallic appearance.’ Manufacturers assemble their products to have maximum appeal. This includes highly reflective car body panels, glossy magazine covers or satin black designer furniture.
This is important as therefore gloss levels can be achieved consistently on every product or across different batches of products.
How is Gloss Measured?
Gloss is measured by shining a specific amount of light at a surface and calculating the reflectance. The angle of the light and the method by which the reflectance is measured are decided upon the surface and the aspect of the surface appears to be measured.
Which Angle Should I Use For My Application?
The ASTM D523, which is the most commonly used standards, describe 3 measurement angles to measure gloss across all surface types. Gloss is measured in gloss units (GU) and is traceable to reference standards held at NRC (Canada), NPL (UK) or BAM (Germany).
Universal Measurement Angle: 60° All gloss levels can be measured using the standard angle of 60° measurement. This is used as the reference angle alongside angles of 85° and 20° which are normally used for low and high gloss levels respectively.
Low Gloss: 75° For improved resolution of low gloss a grazing angle of 75° is used to measure the surface. This angle is recommended for surfaces which measure less than 10GU when measured at 60º. This angle also has a larger measurement spot which will average out differences in the gloss of textured or slightly uneven surfaces.
High Gloss: 20° The acute measurement angle of 20° gives better resolution for high gloss surfaces. Surfaces that measure 70GU and above at the standard angle of 60° are often measured with this geometry. The 20° angle has increased sensitivity to haze effects that affect the appearance of a surface.