HP-GL Color
Encoding
QMS 1725E Print System Reference
5-30
»
Note: The default color for both pen 1 and pen 2 is black. However, the pen
width for these two pens is different. Pen 1 is 0.7 mm and pen 2, like the
other six pens, is 0.3 mm.
The printer maps each pen to its assigned color, then converts the
color to a grayscale using the National Television System Committee
(NTSC) standard equation for encoding color. This equation converts
a given set of CMYK values to grayscale. For the 8 pen colors
assigned to pens 1 - 8, the printer uses the designated grayscale; for
any other pen color, the printer uses the following equation:
[(C*0.3) + (M*0.59) + (Y*0.11) + K]
÷
255
»
Note: This equation assumes that each grayscale is a byte value that
ranges from 0 to 255 (100%). If the sum of the left-side (calculation in
brackets) of the NTSC equation is greater than 255, then the sum is set
equal to 255.
Example
Any color can be reproduced by using some combination of CMYK. If
you have defined the following CMYK values for the color brown in
your application, the NTSC equation that follows shows you how the
percentage of grayscale for the color is derived.
CMYK Value
C (96)
M (128)
Y (224)
K (0)
[(96*0.3) + (128*0.59) + (224*0.11) + 0]
÷
255 = [(28.80) + (75.52) + (24.64) + 0]
÷
255 = 50%
v
Summary of Contents for 1725E
Page 1: ...QMS 1725E Print System Reference 1800387 001B...
Page 12: ...QMS 1725E Print System Reference x Glossary Index v...
Page 13: ...1 Introduction In This Chapter n About this manual n Typographic conventions...
Page 22: ......
Page 100: ......
Page 198: ......
Page 199: ...A QMS Customer Support In This Chapter n Sources of customer support n QMS world wide offices...
Page 250: ......
Page 251: ...E Configuration Menu In This Chapter n Configuration Menu Diagrams...
Page 253: ...Configuration Menu E 3 Configuration Menu Press...
Page 254: ...Configuration Menu QMS 1725E Print System Reference E 4 v Press...