3.1 Products which show any of the following characteristics
obtained by the fire test in appendix 1, shall be considered unsuitable
for use as curtains, draperies, or free-hanging fabric product for
use in rooms containing furniture and furnishings of restricted fire
risk as defined in the relevant regulations of chapter II-2 of the Convention:
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.1 an after-flame time greater than 5 s for any
of the 10 or more specimens tested with a surface application of the
pilot flame (see also paragraph 3.2 below);
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.2 burn through, as determined by appendix 2,
to any edge of any of the 10 or more specimens tested with a surface
application of the pilot flame (see also paragraph 3.2 below);
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.3 ignition of cotton wool below the specimen
in any of the 10 or more specimens tested (see also paragraph 3.2
below);
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.4 an average char length, as determined by appendix
2, in excess of 150 mm observed in any of the batches of five specimens
tested by either surface or edge ignition; and
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.5 the occurrence of a surface flash propagating
more than 100 mm from the point of ignition with or without charring
of the base fabric (see also paragraph 3.2 below).
3.2 If, following analysis of the experimental
data from tests of a fabric, it is found that either or both of the
batches of five specimens cut in both warp and weft directions fail
to meet one or more of the criteria specified in subparagraphs .1
to .3 and .5 above because of poor performance of only one of the
five specimens tested, one complete retest of a similar batch is permitted.
Failure of the second batch to meet any of the criteria shall provide
the basis for rejection of the fabric for use.