Techkon Spectro Jet, Руководство пользователя

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Page 50 Manual TECHKON SpectroJet Chapter 3 – How to use SpectroJet
Measure – Gray balance (densitometric)
When making a measurement on a gray balance patch, the referring density values
for the process colors (without K) are shown in a bar graph. The values for Cyan,
Magenta and Yellow should be in close range to each other to ensure a neutral gray
balance without a color hue.
It is important that the gray balance patch, on which the measurement is taken,
comprises the right %-values to achieve a neutral gray when printed correctly. The
process standard ISO 12647 for offset print defines the values as:
C = 50 %, M = 40 % and Y = 40 %.
The color bars TECHKON TCS Digital include a gray balance patch compliant with
ISO 12647 in every ink zone. The gray balance display will show densitometric gray
balance values for CMY in a bar graph.
At a glance there can be diagnosed, if the overprint of CMY is a neutral gray or if it
has a color cast (1.).
1.