A tie is made from three constituent parts; the blade, or front; the neck; and the tail, or back.
The silk is unfurled and assessed for flaws, then cut on the true bias.
The true bias refers to the 45 degree angle that intersects the warp (length of grain) and the weft (cross grain) of a woven fabric. Cutting this way improves the way the tie hangs and improves the ties ability to recover it's shape post wearing.
This additional care, time and attention to detail and is a skill that takes a master cutter many years to perfect. It is well worth the effort as the end product feels softer and looks to almost ‘flow’.