EIHA’s classification of hemp by colour grades. The data and results demonstrate that communication of hemp fibre colour has meaning and can be universally interpreted; reliable values can replace the subjectivity of colour determination. Colour impression is influenced by many factors; observation conditions and the specifics of the measurements must be the same; standardisation and harmonisation of the method is important. With CIELAB and CIE comparisons between hemp specimens are possible; retting influence can be seen in differences in lightness, chroma and hue. For EIHA we must develop a tolerance specification for an Europe-wide hemp classification; defining areas of “Acceptability”.
author: Jörg Müssig, Faserinstitut Bremen (Germany)
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