Monday, August 5, 2013

How do calculate yarn length, count & weight
Learn Apparel Merchandising, 
Pls find below some rules for calculate yarn length, count & weight.


Length (in yards) = Count *840 *weight of yarn in pound

Count = Length / weight of yarn in pounds*840

Weight of yarn = length/count *840

How do Calculate count of cotton yarn?

Learn Apparel Merchandising
Calculate count of cotton yarn from the given data:

Weight of yarn = 2.68 pounds
Length of yarn = 33600 yard            

Formula: Count = Length / weight of yarn in pounds*840
                              =33600/2.68*840

                          =14.93s

How do Calculate length of cotton yarn?
Learn Apparel Merchandising, 
Calculate length of cotton yarn from the given data:

Weight of yarn = 3.5 pounds
Count              = 40s           

Formula: Length (in yards) = Count *840 *weight of yarn in pound
                                                 = 40*840*3.5
                                                 =117600 Yards 
How do Calculate weight of cotton yarn ?
Learn Apparel Merchandising. 
Calculate weight of cotton yarn from the given data:

Length of yarn = 40600 yards
Count              = 30s           

Formula:
Weight in pounds = Length of yarn in yards/ Count *840
                                                 = 40600/30*840
                                                 = 1.61 pounds

Calculate length of polyester filament ?

Learn Apparel Merchandising. 
In this examples are related to filament. Note that for filament we use direct system. In which most popular is denier. There are other units too. For detail consult the tables at the end of the book. Denier is number of grams per 9000 meters of filament.

For calculation related to denier we use following equations:

Length of filament in meters = Weight of filament in grams* 9000
                                                            Denier
                                                           
Weight of filament in grams = Length in meters * denier                                                                                                   9000


Denier = 9000* Weight of filament in grams
            Length of filament in meters 



Calculate length of polyester filament from the given data:

Weight              690 grams

Denier                75

Equation: 
Length of filament
        in meters  = Weight of filament in grams* 9000
                                             Denier
                                                                        
                        = 690 * 9000
                                  75

                        =82800 meters 

How do Calculate weight of polyester filament ?

Learn Apparel Merchandising
Calculate weight of polyester filament from the given data:
Length in meters = 50900
Denier                     = 50
Equation: Weight of filament in grams 

= Length in meters * denier      

             9000


        = 50900*50      
              9000
           =282.8 grams

How do Calculate denier of polyester filament?

Learn Apparel
Calculate denier of polyester filament from the given data:

Length in meters = 550,000
Weight               = 4.5 kgs (4500 grams)

Equation:    Denier = 9000* Weight of filament in grams
                                Length of filament in meters

                                    = 9000*4500
                                          550,000

Answer= 73.66 Deniers

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