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CIE L*a*b* (Long Form)
The long form for the CIE L*a*b* color space allows a
larger data range than the short form defaults:
L* = 0.0 to 120.0 (greater than the short form by 20.0)
a* = –159.0 to 128.0 (less than the short form by –32.0 and
greater than the short form by 28.0)
b* = –120.0 to 80.0 (less than the short form by 20.0)
Note Although the data ranges may extend beyond the default
data ranges specified in the short form of the CID
command, the printer will clip the data to the short form
data ranges.
Maximum and minimum values are specified for each
primary color. Floating point data must be linearly scaled
(y = mx + b) to the range 0 – 255.
Since a* and b* have no theoretical limits, L*a*b* data may
be sent outside CID constraints. Then data is clipped to
preserve hue and compressed to the device’s printable
gamut.
Using Color Modes 2-19Using Color Modes 2-19