Rhopoint IQ 20/60/85 Gloss Haze DOI Meter - Image 3

Rhopoint IQ 20/60/85 Gloss Haze DOI Meter - Image 4

Rhopoint IQ 20/60/85 Gloss Haze DOI Meter - Image 5

Rhopoint IQ 20/60/85 Gloss Haze DOI Meter - Image 6

Rhopoint IQ 20/60/85 Gloss Haze DOI Meter - Image 7

Rhopoint IQ 20/60/85 Gloss Haze DOI Meter

20/60/85° gloss meter for matt to mirror finishes
Haze and DOI measurement to ASTM E430
To ensure accurate and reliable results, the Rhopoint IQ 20/60/85 Gloss Haze DOI Meter is supplied with standards calibrated and certified according to ISO 17025 UKAS

Categories: Gloss, Haze and DOI, Gloss, Haze, DOI and Opacity

Description

The Rhopoint IQ

The Rhopoint IQ Gloss, Haze & DOI Meter quantifies surface quality problems that are invisible to a standard glossmeter and profiles
how light is reflected from a surface.

The Rhopoint IQ can measure

20/60/85° Gloss
RSPEC
Reflectance haze
Reflected image quality (RIQ)
Distinctness of Image (DOI)
Goniophotometric curves

Glossmeters are usually used to measure the “shininess” of a surface but are not sensitive to common effects which reduce appearance quality.
IQ GLOSS measurements are fully compatible with existing Novo-Gloss and Micro-TRI-gloss results.
Dualgloss 20/60° or Trigloss 20/60/85° versions are for maximum accuracy and resolution in all gloss applications.

What does the Rhopoint IQ measure?

Gloss

A measurement proportional to the amount of light reflected from a surface.

Geometry: The correct measurement geometry should be used according to the sample finish – matt: 85°, mid gloss: 60°, high gloss: 20°

RSPEC

The peak gloss measured over a very narrow angle.

Usage: It is very sensitive to surface texture and can be used to identify subtle differences in smooth surfaces.

Distinctness of Image (DOI)

A measure of how clearly a reflected image will appear in a reflective surface.

Orange peel dramatically reduces appearance quality without affecting gloss readings. These two test panels measure identically with a standard glossmeter. The Rhopoint IQ with RIQ/DOI measurement can quantify the differences.

Reflected Image Quality (RIQ)

RIQ is used to quantify effects such as orange peel and surface waviness. This new parameter gives higher resolution results compared to Distinctness of Image (DOI) measurement and better mimics human perception of surface texture, especially on high quality finishes such as automotive.

Symptoms of poor RIQ: Orange peel, brush marks, waviness or other structures visible on the surface. Reflected images are distorted.

Causes: Application problems, incorrect coating flow, coating viscosity too high/low, sag or flow of coating before curing, incorrect particle size/distribution, overspray, improper flash/ recoat time, inter-coat compatibility, incorrect cure times and cure temperature.

Reflectance Haze

An optical effect caused by microscopic texture or residue on a surface.

Visible symptoms: A milky finish is apparent on the surface with a loss of reflected contrast. Halos and patterns can be seen around reflections of high intensity light sources.

Causes: Poor dispersion, raw material incompatibility, additive migration, vehicle quality, stoving/drying/ curing conditions, polishing marks, fine scratches, ageing, oxidisation, poor cleanliness/surface residue.

Reflectance haze compensation

The instrument compensates for reflection from within the coating for highly reflective pigments, metallic coatings and speciality pigments, allowing the haze of any painted surface to be measured.

Why measure gloss?

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.

Gloss has been defined as ‘The attribute of surfaces that causes them to have shiny or lustrous, metallic 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.

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 of their products, from cars, printing and furniture to food, pharmaceuticals and consumer electronics.

It is important that gloss levels are achieved consistently on every product or across different batches of products.