Fishing and Gear Technology (2+1) copy 1

Unit 4 - Yarn numbering systems/designation of netting yarn

4.1.Introduction
Size of netting yarn is designated as linear density by yarn numbering system, as it cannot be described by thickness or diameter due to practical difficulties. Numbering to designated the thickness of yarn is expressed either as mass per unit length (direct system) or as length per unit mass (indirect system). Important direct numbering systems in use are the direct tex and denier systems and the indirect metric numbering system, British cotton count and runnage systems.