Craft Masterwork Armor( Unearthed Arcana, p. 99)
You are trained in the creation of fine armor and shields.
Craft (armorsmithing) 6 ranks,
You gain 100 craft points. You may use craft points to create masterwork armor or shields. You may spend your craft points to build masterwork armor or shields at a rate of 1 craft point per 10 gp of market value of the fi nished item (minimum 1), even without spending the requisite creation time at work on the item.
If you take the requisite creation time at work on the item, you spend only 1 craft point per 50 gp of market value of the fi nished item (minimum 1).
Characters without this feat can only craft nonmasterwork armor or shields.