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RSpec FAQs

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What is RSpec?

RSpec is the peak reflectance measured over a very narrow angular band in the specular direction (+/-) 0.0991º.

RSpec is very sensitive to any texture that is present on a surface. This texture or waviness acts as a concave or convex reflector that deflects light around the specular angle. When RSpec is equal to the gloss value the surface is smooth, as texture increases the RSpec value decreases.

The diagram above shows the same coating applied to two panels, the first has orange peel/waviness present due to the incorrect application setting on the spray gun.

Rhopoint glossmeter comparison table

Rhopoint Products 20º Gloss 45º Gloss 60º Gloss 85º Gloss Haze (Reflectance) DOI / RIQ RSpec Flat surface Curved surface Surfaces with curvature
Novo-Gloss 45 Glossmeter              
Novo-Gloss 60 Glossmeter                
Novo-Gloss Trio 20/60/85 Glossmeter            
Novo-Gloss 20/60/85 Glossmeter with Haze to ASTM E430          
Rhopoint IQ 20/60 Gloss Haze DOI Meter      
Rhopoint IQ 20/60/85 Gloss Haze DOI Meter    
Concrete Clarity Meter (CCM)        
Novo-Curve Glossmeter            
Novo-Gloss Flex 60 Glossmeter            

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