Single Jersey Fabric

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RELATION BETWEEN YARN COUNT, FABRIC TYPE, MACHINE DIA,
STITCH LENGTH AND FINISH GSM:

Fabric Type	Yarn count	Stitch length (mm)	Color	Machine Dia	Machine Gauge	Finished diameter (inch)	Finished GSM
Plain S/j	18s/1	2.94	White	26	24	30	220-230
Plain S/j	20s/1	2.98	White	30	24	33.5	200-210
Plain S/j	24s/1	2.68	White	30	24	32	175-185
Plain S/j	26s/1	2.66	White	30	24	31	160-170
Plain S/j	28s/1	2.70	Avg	26	24	25	150-160
Plain S/j	30s/1	2.68	Avg	30	24	30	130-140
Plain S/j	34s/1	2.40	Avg	26	24	24	125-135
Plain S/j	40s/1	2.44	Avg	24	24	20	100-110

From the above  tables, we can summarize the above data:
                                                               For Single Jersey fabric

finished Gsm	Count	Finished Diameter
140	30s/1	Machine dia = Finished dia
160	26s/1	Machine dia +1 = Finished dia
180	24s/1	Machine dia + 2 = Finished dia
200	20s/1	Machine dia + 3 = Finished dia
220	18s/1	Machine dia + 4 = Finished dia

N.B: If the fabric is to be Enzyme washed, the stitch length should be kept (10%) less than the normal range. Because, enzyme wash reduces the total weight of the fabric by removing the floating fibre and hairy fibre

For average color, the finished GSM varies 2-4%
If the GSM varies 25-30%, it is not only necessary to control the VDQ pulley dia but also yarn tension & take-up roller


(Collected)
Thanks & best regards
Bipul