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Rhopoint IQ-S Goniophotometer 20/60/85

  • 20/60/85° Gloss meter for matt to mirror finishes
  • Haze measurement to ASTM E430
  • Full statistical analysis with trend graphs
  • Pass / Fail for easy identification of non conformances


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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
  • 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 measurement diagram


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°

IQ product main


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.

DOI example

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.

Car detailing - IQ

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.

Car panel with orange peel and haze