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#1




gsm calculate
sir,
please solve my problem and give formulla to calculate gsm of fabric if i know count and construction 2/20x2/20 40x36 cotton flex how can we calculate gsm 48"? 
#2




Re: gsm calculate
can u do answer for me

#3




Re: gsm calculate
no bodies is ther

#4




Re: gsm calculate
I don't know if there is a formula that calculates it with sufficient accuracy. If there is, I don't know it. It would be easier to just weigh a finished piece of known area. DFetermine weight in grams, divide by area in square meters.

#5




Count & construction
Quote:
Sir, How do calculate count & construction of woven fabric. 
#6




Re: gsm calculate
(warp ct/ EPI + weft ct/ PPI)*25.14 = gsm

#7




Re: gsm calculate
how do we derive constant 25.14?

#8




Re: gsm calculate
I found two formulas here.
http://www.onlineclothingstudy.com/2...enfabric.html Fabric GSM = (EPI/warp count + PPI/Weft count) x (100+crimp %) X 0.2327 and this one: Fabric GSM= ((EPI/warp count X 1.1) + (PPI/weft count x 1.04)) x 23.5 Notice that for a source they use this website. Normally that is fine but it points to a forum post so its only as accurate as the original poster. http://forum.onlineconversion.com/ar...hp?t7064.html 
#9




Re: gsm calculate
Quote:
In a square meter of cloth, 1 m on each side, the total numbers of ends and picks is the EPI and PPI divided by 0.0254 m/in. Because of the over and underweaving, the threads in each direction have to be slightly over 1 m in length. I am assuming that the 1.1 and 1.04 factors are experiential factors that make this correction. Therefore 1.1*EPI/0.0254 and 1.04*PPI/0.0254 give us the total length of thread in each direction in meters. For cotton, a warp or weft count of n means that 840 yd of thread weighs (1/n) pounds. To convert this to g/m, multiply by 453.59237 g/lb, divide by 840 yd, and divide by 0.9144 m/yd. All of these conversion factors may be moved outside the parentheses, resulting in 453.59237/(0.0254 * 0.9144 * 840) = 23.25. The first formula uses the corrections as a percent, if they were a decimal fraction, the constant would be 23.27. The 2nd formula uses 23.5. I believe the correct constant is 23.25 based on conversion, but any minor errors may be covered up by adjusting the two correction factors. 
#10




Re: gsm calculate
(40 + 36 ) / 10 x 100 x 0.2327 = 177 gsm

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