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Grey Scale for Changing Colour
and Staining
Grey Scale for
Staining
The grey
scale consists of nine pairs
of non-glossy grey and white
coloured chips which illustrate
the perceived depth of staining.
They
give a corresponding fastness
ratin of 5, 4-5, 4, 3-4, 3,
2-3, 2, 1-2, 1.
They
are used to assess the amount
of staining occurring on adjacent
undyed fabrics during fastness
tests.
Their
use is described in ISO 105-A03
.
Grey
Scale for Change in Colour
The
grey scale consists of nine
pairs of non-glossy neutral
grey coloured chips which illustrate
the perceived color differences.
These give a corresponding fastness
rating of 5, 4-5, 4, 3-4, 3,
2-3, 2, 1-2, and 1.
They
are used in the assessment of
colour change occurring in fastness
tests as described in ISO 105-A02.
They
are also essential in the grading
of light fastness tests when
using the light fastness standards.
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