1. Introduction
In colour reproduction, it is
generally important for different reasons to know beforehand the colour gamut
of reproducible colours (Berns, 2000). Some industries applying industrial
colorimetry, such as textiles, plastics, leather, paints, usually keep a data
base with their colour gamut, which only occasionally, following commercial
criteria and fashion, is reproduced in a sampler to allow the customers to
judge the colour generating apabilities of the manufacturer. However, few enterprises study whether their colour gamut reaches the MacAdam limits (see Appendix) or whether it
covers more or less homogeneously the Rsch-MacAdam colour solid (Berns, 2000;
Kuehni, 2003). Pointer, in 1980, was one of the first scientists to study this problem (Pointer, 1980). In 2002, Pointer retook this subject, asking for the collaboration of
all persons interested in the matter, to generate a large database of colour
gamuts in current industry (Pointer, 2002). We are particularly interested in
this subject, both in those aspects related to the comparison between the
colour gamuts of different industries and the MacAdam limits and in those
aspects related to how the colour solid is filled, whether homogeneously or
leaving certain void regions.
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