Photometric linearity of optical properties instruments

This standard practice describes a test for linearity required by the following TAPPI optical methods:

• T 425 Opacity
• T 452, 525, 534, 646 Brightness
• T 480, 653 Gloss
• T 524, 527 Color
• T 560, 562 Whiteness

This standard practice is normally used by instrument manufacturers as the procedure for correction of photometric linearity errors.