What angles are used for "Flash, Face and Flop"

The X-Rite MA68II multi-angle spectrophotometer is designed for measuring color on metallic and pearlescent paint finishes. The instrument incorporates a single light source and five fixed—aspecular—viewing angles (15°, 25°, 45°, 75°, and 110°).

The left side of the display label lists the measurement angle description. Each description is adjacent to the data in the display that reflects that angle. The “Flash” displays 15° or 25° angle data, “Face” displays 45° angle data, and “Flop” displays 75° or 110° angle data.