A. How to denominate and express
1.Metric count(used mainly for yarn spun by worsted and woolen yarn spinning system such as worsted yarn ,woollen yarn and mixed yarn,etc )
:" 's " ex) 1/30's, 2/30's, 2/2/30's
2.English count(used mainly for yarn spun by cotton spinning system,such as cotton,rayon,etc)
:" 's " ex) 30/1's, 30/2's, 30/2/2's,
3.Filament yarn : " d "( called denier) ex) 1/150d, 2/150d, 2/2/150d ~~
3.Linen yarn : " lea "( called lea) ex) 1/40 lea, 2/40 lea, 2/2/40 lea ~~
4.How to call : 1/30´s ; called " 30's single yarn " 2/30´s ;called "30's two ply yarn "
2/2/30,s ; called " two ply yarn of 30's two ply yarn "
1/150d; 150d single yarn, 2/150d; 150d two ply yarn~~
1/40 lea ; linen 40 lea single yarn, 2/40´s ; linen 40 lea two ply yarn~~
B. Calculation of yarn count
1.Worsted count (it belongs to staple fiber) Constant weight system,using metric count system
*when 1 gram of yarn runs 1 meter in length, we call 1's yarn.
2 meters 2's
3 " 3's
2.Denier count(it belongs to long fiber in other word, fillament. Constant length system.
* If 9000 meters of yarn weigh 1gram,we call it 1d fillament.
2grams 2d
3 " 3d
3.How to convert from one system to other sytem of yarn count.
*Based on metric count, 1's Nm count = 1.7 x 1's Ec count
= 9000/denier count(d)
= lea x 0.6
ex) 1/60's Nm = 1/35's Ec
= 150d
= 100 lea
*Calculation of ply yarn, ply count = A's x B's/A's + B's
ex) two ply of 1/20's and 1/30's ; 20 x 30 /20 +30 =600 /50
=1/12's
4.E. Mark of twist (direction of twist)
Left twist=Z twist : " / " Z direction, Right twist=S twist : " \ " S direction
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