Why use RIQ instead of DOI?

DOI (Distinctness of Image) is not sensitive to low amounts of orange peel on the highest quality surfaces.

RIQ (Reflected Image Quality) has more proportionate response to orange peel on a wider range of surface finishes.

RIQ works well in differentiating low gloss surfaces with different specular/diffuse components.

RIQ measurement is sensitive enough to quantify appearance differences due to-

• Substrate alignment (horizontal/vertical)
• Coating formulation
• Substrate
• Application technique

Gloss, Haze, DOI and RIQ values are all produced simultaneously in one fast measurement using the Rhopoint IQ.