ISO 2647:1973 Preview
Wool -- Determination of percentage of medullated fibres by the projection microscope
This standard was last reviewed and confirmed in 2012. Therefore this version remains current.
The method is applicable to woolen and worsted products, at all stages, from raw materials to yarn. It utilizes the same apparatus and technique as that described in ISO/R 137. Since the method of preparation and measurements gives a length-biased sample, the result given by this method is an estimate of the length of medullated fibres as a percentage of the total length of all fibres. It cannot be used to estimate the volume of medullation or fibre density.
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