At a steep angle only a truly smooth, highly reflective surface returns much light, so the 20-degree reading spreads out high-gloss grades that all look alike at 75 degrees. Cast-coated papers, varnished or laminated prints and photo papers are judged this way. A sheet that sits near the 75-degree ceiling can still show clear differences at 20 degrees.
Both samples read 88 at 75 degrees, so run 20-degree gloss; the cast-coated one should pull ahead.
Also heard as
- 20 gloss
Related terms
Gloss
The mirror-like shine of a paper or print surface, measured as specular reflectance at a defined angle.
75-degree gloss
Specular gloss measured at 75 degrees from the normal, the standard angle for coated and most uncoated papers.
Print gloss
Gloss of the printed ink film on a paper, as distinct from the gloss of the bare sheet.