Barbieri Spectro LFP qb Operating Manual page 26

Absolute white calibration
The absolute white calibration method is used to determine the cor-
rect L* a* b* values of the target including its white point. As the L*
value can be as low as 50 or lower for diffuse/opaque materials, this
method is not recommended for linearization and color management
applications as it will not result in accurate calculation of ICC profiles.
26
Spectro LFP qb - Operating Manual
Cut off the reference area of the
target to allow the instrument to
calibrate to absolute white.