HP L 5 manual Device CMY Long Form, CIE L*a*b* Long Form

Device CMY (Long Form)

The long form for the Device CMY color space (value field is 18) provides explicit entry of black and white references (range is –32767 to 32767). Black and white references are used in the direct pixel encoding modes (2,3) to set relative limits for raster data; they are also used when specifying the primary components of new palette entries (?*v#A, ?*v#B, ?*v#C). Black and white references have no effect on the default CID palette colors. The reference values are specified as 16-bit signed integers (sint16).

Note	The short form for the Device CMY color space defaults each
	primary’s white reference to 0 and black reference to 2n–1, where n is
	the number of bits for that primary.
	Byte	15 (msb)	8	7	(lsb) 0	Byte
	0	Color space		Pixel encoding mode		1
	2	Bits per index		Bits per primary #1		3
	4	Bits per primary #2		Bits per primary #3		5
	6	White reference for primary #1 (sint16)				7
	8	White reference for primary #2 (sint16)				9
	10	White reference for primary #3 (sint16)				11
	12	Black reference for primary #1 (sint16)				13
	14	Black reference for primary #2 (sint16)				15
	16	Black reference for primary #3 (sint16)				17

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)

B-18 Using Color Modes (Color LaserJet, 5, 5M, DeskJet) EN