Abstract
An investigation has been made into the possibility of using the Pauly test for the quantitative estimation of wool damage. Rapid decomposition of aqueous solutions of diazo compounds, resulting in the formation of coloured azo compounds within wool flbres, has been observed. Such colour development can occur in undamaged fibres, leading to false conclusions. Other diazo compounds have been investigated, and it has been found that diazotised o‐nitroaniline is considerably more stable than diazotised sulphanilic acid and gives reproducible results when used to measure damage. Preliminary work using the modified test indicates that a single test of this type is incapable of detecting or measuring all types of damage.
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