Physical Testing
Grab and strip results are not the same number in different clothing. The fabric outside the jaws is carrying load, and it is often half the reading.
— N
Strip result converted through the assistance model
The assistance factor is fabric-specific — a tightly woven cloth transfers load sideways far better than an open or knitted structure, and a fabric with no lateral load transfer would give an assistance factor near zero. Never report a converted figure as a test result: convert to compare, then test by the method the specification actually calls for.
Grab vs Strip Tensile Conversion Calculator — free, with the formula and a worked example, at Textile School.