|The Rhopoint Novo-Gloss Trigloss 20 60 85 degree Gloss Meters are designed to meet the measurement criteria for most gloss measuring applications. Small, lightweight and durable these instruments can be used in the most demanding environments. The high specifications, including statistical analysis, graphical analysis and software-free PC down load facility make it the ideal choice for general gloss measurements.
The Rhopoint Novo-Gloss Trigloss 20 60 85 degree Gloss Meters can be used in accordance with :
Why measure Gloss?
Gloss is an aspect of the visual perception of objects that is as important as colour when considering the psychological impact of products on a consumer. It has been defined as ‘The attribute of surfaces that causes them to have shiny or lustrous, metallic appearance.’ The gloss of a surface can be greatly influenced by a number of factors, for example the smoothness achieved during polishing, the amount and type of coating applied or the quality of the substrate. Manufacturers design their products to have maximum appeal: highly reflective car body panels, gloss magazine covers or satin black designer furniture.
It is important therefore that gloss levels are achieved consistently on every product or across different batches of products. Gloss can also be a measure of the quality of the surface, for instance a drop in the gloss of a coated surface may indicate problems with its cure, leading to other failures such as poor adhesion or lack of protection for the coated surface. It is for these reasons that many manufacturing industries monitor the gloss of their products, from cars, printing and furniture to food, pharmaceuticals and consumer electronics.
How is Gloss Measured?
Gloss is measured by shining a known amount of light at a surface and quantifying the reflectance. The angle of the light and the method by which the reflectance is measured are determined by surface and also aspect of the surface appearance to be measured.
Which Angle should I use for my application?
ISO 2813 and ASTM D523 (the most commonly used standards) describe three measurement angles to measure gloss across all surfaces.
Gloss is measured in gloss units (GU) and is traceable to reference standards held at BAM (Germany), NRC (Canada) or NPL (UK).
Universal Measurement Angle: 60°
The Novo-Gloss 60 is perfect for basic gloss measurement and is best suited for mid gloss surfaces (10-70GU @60°).
60° is referred to as the universal measurement angle and is the most commonly specified geometry in applications such as paints, coatings, plastics, automotive interiors and general manufacturing.
It can be used as a basic gloss assessment for any surface from matt surfaces to mirror finish polished metals.
Low Gloss: 85°
Whilst adequate for some applications, the 60° geometry has low measurement resolution at gloss levels <10GU. This means that two matt surfaces which have visually different surfaces may have minimal differences in values when measured using this geometry. For improved resolution of low gloss a grazing angle of 85° 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.
For matt surfaces (<10GU @60°) an instrument with the 85° geometry should be used 20°/60°/85° Trigloss or Rhopoint IQ 20°/60°/85°.
High Gloss: 20°
A limitation of the 60° geometry is that it is has almost no sensitivity to surface effects such as haze and visible textures such as orange peel. When present these effects will reduce the visual quality of high gloss surfaces but will have little or no effect on measured 60° gloss values.
For high gloss surfaces (gloss >70 GU), an instrument that includes the 20° angle should be specified – Novo-Gloss Dualgloss 20/60°, Novo-Gloss Trigloss 20/60/85°. The 20° geometry has limited sensitivity to reflection Haze.
The acute measurement angle of 20° gives improved resolution for high gloss surfaces. The 20° angle is more sensitive to haze effects that affect the appearance of a surface. To quantify haze, distinctness of image, reflected image quality and other surface texturing please consider the Rhopoint IQ.
Rhopoint Novo-Gloss Trigloss 20 60 85 degree Gloss Meters – Specifications
|Gloss Angles and Applications|
|20°||High gloss surfaces such as automotive paint finish, polished metals and plastics|
|60°||Universal gloss measurement angle for all applications|
|85°||Matt surfaces such as automotive interiors, architectural paints and wood finishes|
|20°/60°/85°||Measure or calibrate all three angles simultaneously|
|Measuring Range:||85°: 0 – 199 GU|
|60°: 0 – 1000 GU|
|20°: 0 – 2000 GU|
|Power:||Rechargeable lithium ion, 17+ hours operation|
|Battery life:||10,000+ readings|
|Recharge time:||USB 4.5 hrs , mains charger 2.5 hrs|
|Dimensions :||65 x 140 x 50 mm (H x W x D)|
|Languages :||EN, FR, D, NL, ESP, IT, TK, CZ|
|N-G20/60/85||Novo-Gloss Trigloss||Triple Angle Gloss Meter||20 / 60 / 85|
Rhopoint Novo-Gloss Trigloss 20 60 85 degree Gloss Meters Packing List:
Each instrument is supplied with :
- a BAM Traceable Calibration Tile with Protective Case
- Calibration Tile Cleaning Kit
- Quick Start Guide
- USB Data cable
- Spare Light Source
- CD with Novo-Soft™ Software
- Full instruction manual in pdf format
- Instructional Video
- Instrument Carrying Case
- Internal Battery
- Mains Charger
Rhopoint Novo-Gloss Trigloss 20 60 85 degree Gloss Meters – Data Sheet
Rhopoint Novo-Gloss Trigloss 20 60 85 degree Gloss Meters – Standards
The Rhopoint Novo-Gloss Trigloss 20 60 85 degree Gloss Meters can be used in accordance with the following Standards:
- ISO 2813 – Paints and varnishes – Determination of specular gloss of non-metallic paint films at 20˚, 60˚ and 85˚
- ASTM D523 – Standard Test Method for Specular Gloss
- ASTM D2457 – Standard Test Method for Specular Gloss of Plastic Films and Solid Plastics
- DIN 67530 – Reflectometers a means for gloss assessment of plane surfaces of paint coatings and plastics
- JIS Z 8741 – Specular glossiness – Method of measurement
- ISO 7668 – Anodized aluminium and aluminium alloys – Measurement of specular reflectance and specular gloss at angles of 20˚, 45˚, 60˚ and 85˚