Page 151 - Graphic Design and Print Production Fundamentals
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Graphic Design 139
• GCMI, a standard for colour used in package printing developed by the Glass Packaging
Institute (formerly known as the Glass Container Manufacturers Institute, hence the
abbreviation).
• HKS is a colour system that contains 120 spot colours and 3,250 tones for coated and
uncoated paper. HKS is an abbreviation of three German colour manufacturers: Hostmann-
Steinberg Druckfarben, Kast + Ehinger Druckfarben, and H. Schmincke & Co.
• RAL is a colour-matching system used in Europe. The RAL Classic system is mainly used
for varnish and powder coating.
The guiding principle for using any of these spot colour systems is to check that the manufacturer of
the reproduction is using that ink system. The Trumatch library is quickly gaining favour as a tool for
colour selection. That library of spot colours has been developed to be exactly replicated with process
colour halftone screening. There are no spot colours a designer can choose from that library that cannot
be reproduced well with standard process inks. As more computer graphics are being produced on digital
imaging devices that only use CMYK, this colour library is becoming the choice for cross-platform or
multi-vendor media publications.
