Select the correct Yarn count for Pique fabric?

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Select the correct Yarn count for Pique fabric:

In my this post I will introduce you with some equations, with which we can select the actual yarn count for knit the fabric. These are vary for fabric types.

Pique 

Say, the require GSM is 180

Yarn count  = (-0.146) X (GSM) + 57.16

                   = (-0.146) X (180) + 57.16

                   = -26.28 + 57.16

                   = 30.88

So, to knit 180 gsm Pique fabric we need yarn count 30.88/s

Thanks & best regards

BIPUL