"Red coating" means, for purposes of 35 Ill. Adm. Code 218 and 219, a coating that meets all of the following criteria:
Yellow limit: the hue of hostaperm scarlet;
Blue limit: the hue of monastral red-violet;
Lightness limit for metallics: 35 percent aluminum flake;
Lightness limit for solids: 50 percent titanium dioxide white;
Solid reds: hue angle of -11 to 38° and maximum lightness of 23 to 45 units; and
Metallic reds: hue angle of -16 to 35° and maximum lightness of 28 to 45 units.
These criteria are based on Cielab color space, 0/45 geometry. For spherical geometry, specular included, the upper limit is 49 units.
Ill. Admin. Code tit. 35, § 211.5400
Added at 34 Ill. Reg. 14119, effective September 14, 2010