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Glossary
CIELab terms: CIELab is a color
space or system that was defined by CIE (Comité Internationale
de l'Eclairage), a color standardising committee.
CMYK: It is a subtractive color system
of the four colors; cyan , magenta, yellow and black used in
printing processes. Therefore, CMYK is the abbreviation of all
four of these colors with "K" meaning black, as "B"
is used in RGB.
Color OK! A registered trademark used
to describe a certain standard in color print production where
the user can expect reliable and accurate color printing by
using Focoltone products.
Color verification: It is
a step whereby the printed color output is checked visually
to correspond with the color reference i.e. the Focoltone Calibration Chart.
Contaminants: Unnecessary colorants
in referenced CMYK colors that lead to adulterated inaccurate
colors.
Factory default color-curve:
Most printers come with an in-built color reference, or color
curve that should enable accurate colors to be printed in the
final product, but this color curve is affected various environmental
factors, and can sometimes fail to produce a standardised color
system. Also see ICC profile.
Offset printing: A printing
process that uses a plate to make an inked impression on a rubber-blanketed
cylinder, and finally printed on the final printing material
such as paper.
ICC Profile: An ICC Profile
refers to a color management system that is aligned to ICC specifications,
and allows the profiles to be exchanged and interpreted accurately
between different users. The profile helps users to obtain correct
color reproduction between different color devices such as monitors
& printers.
Negative color comparison:
the measurement of color differences between the Test Sheet
output of the printer and the target Focoltone Calibration Chart.
RGB: The three primary colors of red,
green and blue make up RGB and is used by various applications
to define colors of images and objects. But RGB cannot be used
in print, but must instead use CMYK.
Scan: In order to verify the color's
accuracy, a verification step is required and in the Focoltone
ICCS, it requires that the Calibration Chart and the printed
material are both scanned using a scanner to the Focoltone software
to check for color accuracy.
White Paper: Technical papers
that detail the Focoltone ICCS and give precise and clear information
about its various technical terms and applications. Mostly,
the White Papers are for industry professionals, researchers
and academics.
Zero: The standard at which the printer
prints perfect CMYK colors. Numerical measurements of color
that deviate from zero, e.g. -5 or +10, signify a deviation
in the printer output from the perfect zero standard. "Zeroing"
refers to the act of correcting the printer to print accurate
CMYK colors.
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