For determination of the end-point, we recommend this product from Mitutoyo.
It can be used for woven, knitted and nonwoven fabrics:
- 183-101 Pocket Comparator No. 183 8x magnification
- 183-108 Grid and Diameter Reticle (No.7)
These part numbers are the Mitutoyo part numbers, not James Heal stock codes.
See the PDF for pictures.