BS EN 20105-A01:1993 Textiles. Tests for colour fastness - Part A01. General principles of testing
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1.1 This part of ISO 105 provides general information about
the methods for testing colour fastness of textiles for the
guidance of users. The uses and the limitations of the methods
are pointed out, several terms are defined, an outline of the
form of the methods is given and the contents of the clauses
constituting the methods are discussed. Procedures common
to a number of the methods are discussed briefly.
1.2 By colour fastness is meant the resistance of the colour
of textiles to the different agencies to which these materials
may be exposed during manufacture and their subsequent use.
The change of colour and staining of undyed adjacent fabrics
are assessed as fastness ratings. Other visible changes of the
textile material under test, for example surface effects, change
in gloss or shrinkage, should be considered as separate proper-
ties and reported as such. Any loose fibres from the specimen
adhering to the adjacent fabrics shall be removed before
assessment of staining.
1.3 The methods may be used not only for assessing colour
fastness of textiles but also for assessing colour fastness of
dyes. When a method is so used, the dye is applied to the tex-
tile in specified depths of colour by stated procedures and the
material is then tested in the usual way.
1.4 For the most part, individual methods are concerned with
colour fastness to a single agency, as the agencies of interest in
a particular case, and the order of application, will generally
vary. It is recognized that experience and future developments
in practice may justify procedures in which two or more
agencies are combined.
1.5 The conditions in the tests have been chosen to corre-
spond closely to treatments usually employed in manufacture
and to conditions of ordinary use. At the same time, they have
been kept as simple and reproducible as possible. As it cannot
be hoped that the tests will duplicate all the conditions under
which textiles are processed or used, the fastness ratings
should be interpreted according to the particular needs of each
reporting colour fastness.
