IEC 60793-1-32:2010 is intended primarily for testing either fibres as produced by a fibre manufacturer or subsequently overcoated (tight buffered) using various polymers. The test can be performed either on fibres as produced or after exposure to various environments. This test applies to A1, A2, A3, B and C fibres. This edition has been modified to include current practices in the market place. This publication contains colours which are considered to be useful for the correct understanding of its contents