Barbieri Spectro LFP S3 Operating Manual page 19

Spectro LFP RT - Operating Manual
Transmission
Transmission calibration is done automatically on the position of the
upper left corner of the target area.
In transmission, you have the option to choose between two calibration
modes:
• relative (default) or
• absolute
Relative white calibration
Nearly all linearization and profiling targets require to calibrate against
the white of the material to be measured, assuming this as the refer-
ence white with a value of L*=100 a*=0 b*=0.
This is in particular necessary for the creation of ICC profiles for non
completely transparent materials (like Kodak Duratrans etc.). In this
case, the calibration area is covered by the white part of the material
and the instrument automatically calibrates to that white.
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