Why Change from Weighing Fabric (GSM) to measuring the density (PPI or CPI)?
Because fabric density can be measured continuously, it provides a better and more consistent way to control fabric weight uniformity and predict residual shrinkage. Infrequent weight measurements do not provide enough information for the operator to compensate for varying yarn counts or fabric density changes due to prior processes. The finished fabric weight varies widely, and many rolls are overweight -an unnecessary expense and loss of revenue.
However, using an online, continuous fabric density (CPI or PPI) measurement system to set up and adjust the finishing machine for a specific course (pick) count results in fabric within weight specifications.