SATRA remains open during the coronavirus COVID-19 pandemic and has organised additional online resources and a special webinar programme
SATRA STD 174 Break/pipiness scale
This is a widely-used reference scale for measuring the wrinkling of the grain of leather or the top surface of a synthetic material when folded inwards to a standard curvature.
It consists of a graded selection of replicas of leather numbered one to eight with different amounts of pipiness and a mandrel for bending the sample to the same radius as the scale.
By using the numbered scale, a more objective evaluation can be made of the pipiness of a material.