To understand what I will say we have to return to basis.
A Natural silk is like a Dacron on which is applied a varnish.
The varnish obstruct the roughness of the weaving. the finer the weave ,the less varnish need.so the silk is more flexible and more durable. Indeed,If varnish too thick he tend to crack, flake and to go out. In that time, it must be repaired or changed.
Regarding parallel profiles, all natural silk are good. (Vers a soie, Thiebault, Phoenix, Terenzio)
…. You just said the contrary … You idiot … ..
Wait, I ‘m coming.
Qualities from TT and WF modern profiles (I don’t use DT anymore, so I don’t peak about) come from the shape and the inhomogeneity weight along the line. On a synthetic line, the plastic gives the form. On a natural silk line, is the weaving and is super complicated to keep a smooth weaving when you change the diameter.The top * from this game is first Terenzio (the best i never see), second Phoenix and third Thiebault. Yet we can talk about the varnish quality , I think it’s nitpicking … Everything lies in weaving.