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Rhopoint Novo-Gloss Gloss Meters |
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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).
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Features
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Technical Data
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| Technical Data |
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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 % |
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(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)
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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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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."
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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.
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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). |
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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. |
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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. |
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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. |
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| Sample 1- No Haze, deep reflection |
Sample 2- High Haze, "shallow" finish |
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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. |
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| Sample 3- Low Haze |
Sample 4- Higher Haze |
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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
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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)
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Σ Pixels between 20°±0.9° (standard) |
| Haze = 100* |
Σ Pixels from 17° to 19° (sample)+
Σ Pixels from 21° to 23° (sample)
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Specular Gloss (Standard)
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| logHaze = |
1285(log10((Haze/20)+1)) |
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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. |
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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. |
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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.
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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. |
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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. |
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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) |
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| 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 |
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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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