Fishing and Gear Technology (2+1) copy 1

Unit 4 - Yarn numbering systems/designation of netting yarn

4.5.Complete designation of netting yarn or finished product

According to ISO the complete designation of the above netting yarn as follows.

• 20 is the Tex value of single yarn
• 2 No. of single yarns in the first fold
• 3 No. of folded yarns in the finished product
• S and Z are the direction of the twist
• 700, 400 and 200 are the no. of twist
• R tex value of the finished product

Another system which is in common use for finished netting twine s and ropes, is runnage. It is expressed as m.kg^-1 / feet lb^-1 , yard lb etc and is the reciprocal of Rtex.