Kaorti Resin Weapons help. Because Crit Happens.

[Kaiyanwang]

It doesn't change the threat range, that's why they decided to charge you EWP for it.

Cyclocone, you caught me: I didn't show all the data

Weapons made from kaorti resin require the Exotic Weapon Proficiency feat to wield, and each must be specific to each ribbon weapon. For example, if the character acquires one of the ribbon longswords of wounding wielded by the Guardians of Gloom and Despair, she must take the Exotic Weapon Proficiency (longsword) feat. If she has acquired a ribbon dagger also, she must take the dagger version of the feat as well.

I think that the ribbon dagger is a special case as far as crit range goes. If you made a longsword out of Kaorti resin it would most likely be 19-20/x4, because it does not specifically state that it changes the crit range, just the multiplier.

Good points. Actually, mergeing Cyclocone and dsmiles answer, I could think that the Wind-Kissed Blade is born. Waiting for other people answer, but thanks, gentlemen.