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Home  >>  Products  >>  Color/Gloss  >>  Novo-Gloss Gloss Meters

Rhopoint Novo-Gloss Gloss Meters


Statistical Novo Gloss

 

The Rhopoint Novo-Gloss is a series of Gloss Meters that measure gloss, they include a 60° Glossmeter, a 45° Glossmeter, a 20/60/85° Glossmeter, and a 20/60/85° Glossmeter with haze (which meets ASTM E340 and D4039 specifications).




FEATURES TECHNICAL DATA APPLICATIONS MORE INFO VIDEO PRICE LIST
 

 

Features

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Trigloss Trigloss Trigloss
     
Measurement
Simultaneous measurement of
all parameters in GU or % reflectivity, date and time stamped.

Statistics
Displays full statistics for the
readings in the current batch.
Graphical
Graphical reporting for quick
trend analysis.
 
Trigloss Trigloss Trigloss
     
Parameters
Pass/fail parameters can be
defined for instant identification
of non-conformances.
Automatic Measurement
Automatic measurements at
pre-defined intervals for easy
checking of large surface areas.
Batch Names
User definable batch names
and batch sizes for quicker and
more efficient reporting.

 

Technical Data

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Technical Data
  20° High Gloss FInishes 45° Speciality Angle 60° All Gloss Finishes 85° Low GLoss Finishes Haze
Range (GU): 0-100
100-2000
0-100
100-1000
0-10
10-100
100-1000
0-100
100-199
(Log HU) 0-500
Repeatability: 0.2 (GU)
0.2 %
0.1 (GU)
0.2 (GU)
0.2%
0.2 (GU)
0.2 %
(Log HU) 1
Reproducibility: 0.5 (GU)
0.5 %
0.2 (GU)
0.5 (GU)
0.5 %
- (Log HU) 10
Resolution (GU): 0.1
Measurement Area: 6.0 x 6.4 (mm) 8 x 12mm ellipse 6.0 x 12.0 (mm) 4.4 x 44.0 (mm)
6.0 x 6.4 (mm)
Standards: ISO 2813, ASTM D523, ISO 7668, ASTM D2457, IN 67530, JIS Z 8741 ASTM D2457,
ASTM C346
ISO 2813, ASTM D523, ISO 7668, ASTM D2457, IN 67530, JIS Z 8741 ASTM E430,
ASTM D4039
General
Battery Type: Rechargeable lithium ion
Operation (hours): 17+
Readings per Charge: 20.000+
Memory: 8MB, 2,000 readings
Operating Temp: 15-40°C (60-104°F)
Operating Humidity: Up to 85%, non condensing
Dimensions & Weights
Dimensions: 65mm x 140mm x 50mm (H x W x D)
Instrument Weight 390 g
Packed Weight: 1.6 kg
Packed Dimensions: 110mm x 280mm x 220mm (H x W x D)
Applications
Paints and Coatings, Yacht Manufacturers, Automotive Re-finish, Smart devices (PC & Laptop Covers), Furniture, Metal Polishers, Polished Stone, Wood Coatings, Automotive, Printed Cartons, Plastics Industry, Printing Ink, Aerospace, Detailing, Textile, and Powder Coating

 

Sample Applications

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Applications

 

Why Measure Gloss?

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The gloss level of an object is one of the visual attributes used by a consumer to determine whether or not that object is fit for purpose. For example, if the gloss measurement is too high the surface is extremely shiny, too low a possible dull finish.

Gloss Measurement has been defined as "The measurement of the attribute of surfaces that causes them to have shiny or lustrous, metallic appearance."

 

Gloss Appearance

Manufacturers design their products to have maximum appeal: from highly reflective car body panels to glossy household appliances or matt finish automotive interior trim. This is especially noticeable where parts may be produced by different manufacturers or factories but will be placed adjacent to one another to create the finished product. Therefore it is important that gloss measurements are taken to insure that consistent gloss levels are achieved 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.

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. It is for these reasons that many manufacturing industries monitor the gloss through gloss measurement taken with a glossmeter of their products, from cars, printing and furniture to food, pharmaceuticals and consumer electronics.

 

How is Gloss Measured?

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Gloss measurements are taken 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 the surface material and which aspect of the surface appearance is 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 NIST (USA).

Gloss Appearance

   
Universal Measurement Angle: 60°
All gloss levels can be measured using the
standard measurement angle of 60°. This is used
as the reference angle with the complimentary
angles of 85° and 20° often used for low and high
gloss levels respectively.
Low Gloss: 85°
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 60°.

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 improved
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 is more sensitive to haze effects that
affect the appearance of a surface.

Speciality measuring angle: 45°
This measuring angle is in accordance with the
ISO 2457 standard for the gloss measurement of
plastic films and solid plastic parts as well
as according to the standard ASTM C346 for
the gloss measurement of ceramics

To quantify haze, distinctness of image, reflected
image quality and other surface texturing please
consider the Rhopoint IQ.

 

Haze

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Haze can be described as near specular reflection. It is caused by a microscopic surface structure which slightly changes the direction of a reflected light causing a bloom adjacent to the specular (gloss) angle. The surface has less reflective contrast and a shallow milky effect.

In the coatings industry, this microscopic surface texture is often due to poorly dispersed raw materials, incompatible raw materials or oxidation and weathering. For polished metal surfaces, haze is often associated with polishing marks or chemical residue.

Haze

Haze
Haze is light that has been reflected by small surface structures adjacent to the main specular component. Reflectance haze - An optical effect caused by microscopic texture or residue on a surface.


Reflection Haze
Reflection haze is an optical phenomenon usually associated with high gloss surfaces.

It is a common surface fault that reduces appearance quality. A hazy surface has a visibly shallower reflection with a milky finish and halos appear around reflections of strong light sources.

Haze
Sample 1- No Haze, deep reflection Sample 2- High Haze, "shallow" finish

A high gloss finish with haze exhibits a milky finish with low reflective contrast and reflected highlights. Lowlights are less pronounced.

On surfaces with haze, halos are visible around the reflections of strong light sources.
Haze
Sample 3- Low Haze Sample 4- Higher Haze

 

Causes of Haze

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  • Coating & Raw Materials
    • Dispersion
    • Pigment properties
    • Particle size
    • Binder compatibility
    • Influence and migration of additives
    • Resin types and quality
  • Curing
    • Drying conditions
    • Cure temperature
  • Post Coating
    • Polishing marks
    • Cleanliness
    • Ageing and oxidisation
Hazes

 

Gloss and Haze Measurement with Array Technology

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The 20/60/85 Novo-Gloss Gloss Meter with haze uses a 512 element linear diode array which profiles reflected light in a large arc from 14° to 27°. The instrument processes this high resolution data, selecting individual elements within the array that equate to the angular tolerances outlined in international measurement standards.

In a single 20° measurement, the calculations made are pictured below.

Gloss =

Σ Pixels between 20°±0.9° (sample)
________________________________

Σ Pixels between 20°±0.9° (standard)

Haze = 100*


Σ Pixels from 17° to 19° (sample)+
Σ Pixels from 21° to 23° (sample)
________________________________

Specular Gloss (Standard)

   
logHaze = 1285(log10((Haze/20)+1))

 

Curved Surface Adjustment

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A major advantage of the 20/60/85 Novo-Gloss Gloss Meter with haze is that it automatically compensates for curved or textured sample surfaces by virtually adjusting the measurement position.

Conventional gloss haze meters have fixed optics which can make measurement unreliable as any sample curvature will reflect light away from the center of the measurement sensor causing errors. The

Novo-Gloss 20/60/85 version with haze automatically adjusts the sensor position by detecting the peak of the reflected light. The laws of reflection state that the incident angle is equal to the reflection angle thus the peak equates exactly to the 20° gloss angle.

 

Diffuse Corrected Haze with Array Technology

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Reflection haze is caused by micro texture on a surface which causes a small amount of light to be reflected adjacent to the gloss angle. For white surfaces, bright colors and metallics, a certain amount of diffuse light, reflected from within the material, is also present in this region. This diffuse light exaggerates the haze signal for these surfaces causing higher than expected readings. * Only enabled when the instrument is set to haze measuring mode of ASTM E430

The 20/60/85Novo-Gloss Gloss Meter with haze compensates for reflection from within the coating for highly reflective pigments, metallic coatings and specialty pigments, allowing the haze of any painted surface to be measured.

Haze Curve

 

Corrected Haze on Metallic Coatings

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For non-metallic surfaces, the diffuse component is Lambertian: It is equal in amplitude at all angles in relation to the sample surface. Conventional gloss haze meters measure diffuse reflection using a luminosity sensor positioned away from the gloss angle. Luminosity is subtracted from the haze signal allowing non-metallic surfaces to be measured independently of their color.

Gonio photometric information profiling the reflection from white, grey and black panels with an identical topcoat.

Haze Curve

Haze Measurement

The 20/60/85 Novo-Gloss Gloss Meter with haze captures compensation information from a region adjacent to the haze measurement angle. This means it can be used on metallic coatings which reflect light.

An advantage of the Novo-Gloss 20/60/85 version with haze is that unlike a conventional instrument, compensation is calculated using a region adjacent to the haze angle. This technique gives compatible readings on solid colors but also compensates for directional reflection from metallic coatings and specialty pigments.

 

Video

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For more helpful videos on the Rhopoint Gloss Meters bluetooth interface, how to use it and customize batches, as well as a videos on the best practices and calibration guides... click this link.

 

Competitive Pricing

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
Trade-in a broken or outdated gloss meter, any style or brand, and get 10% off of a brand new Novo-Gloss Series meter.

Certified calibration tile with certificate, USB data cable, Wrist strap, Novo-Gloss Multi Gauge software, Instructional videos, USB data stick (with Instruction manual, BT wireless data app, Example Excel spreadsheets)
GL-223101 Rhopoint Novo-Gloss 60° Glossmeter $1,596.00
GL-223401 Rhopoint Novo-Gloss 45° Glossmeter 1,795.00
GL-223361 Rhopoint Novo-Gloss Trigloss 20/60/85° Glossmeter 2,574.00
GL-223301 Rhopoint Novo-Gloss Trigloss 20/60/85° Glossmeter with Haze (ASTM D4039, E430) 3,339.00
We are an established North American Distributor for Rhopoint Instruments, and have been providing, servicing, calibrating and certifying their high quality instruments for over 33 years.



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