Chino, the name came from both the trouser style worn by British Colonial troops in the 1800′s and the cotton fibre used for the fabric named twill.
A fine end is a warp yarn of smaller diameter in the fabric, mostly a description of the defect silk warp consisting of thin places were filaments required to make up the full ply missing, generally poor reeling.
Ply yarns; all are single-ply unless twisted with another yarn called two-ply and three-ply if three twisted. Plied yarns are used to make garment stronger.
PLY YARN ILLUSTRATION
Z-Twist is a term used to describe a right-handed twisted yarn, in contrast to S-Twist.