
Weaving Basics
EPI and PPI in Weaving: Read a Sample Record
EPI means ends per inch: the number of warp threads across an inch of woven cloth. PPI means picks per inch: the number of weft passes along an inch.
A weave name describes how yarn systems cross. It does not, by itself, identify the fibre, place of origin, maker, date, durability, or cultural meaning of a textile. These guides begin with structure and observation. When an example belongs to a named tradition or community, the source and limits of that example should remain visible.

EPI means ends per inch: the number of warp threads across an inch of woven cloth. PPI means picks per inch: the number of weft passes along an inch.

Plain, twill, and satin are weave structures. Plain weave alternates over one and under one.