The Enchanting Forge
Spread Sheet for Forge properties, cost, materials, etc: http://users.skynet.be/fc387255/sinfar/crafting.htm
The enchanting forge, located in Sinifer and several other islands, it lets you add magical property to crafted items. Crafted items can currently be bought from the travelling merchant in the emporium of Sinifer and other island stores.
To enchant a crafted item, you need to put a non-enchanted, crafted items in an enchanting forge and close it. A dialog will let you select the properties that you want to add, but it is restricted.
Each items can accept a certain number of PP (Property Points) and each property cost a certain number of PP. So when you will choose a property, the forge will tell you how much PP it cost and it must be equal or bellow the number of PP left that you can put on the item.
This is for balance reasons.
After selecting the properties that you want, you will need to find the required components. The forge tells you what components you will need and how many of them. Components can be looted, but currently not all of them, so there's a merchant next to the forge that sells them.
Once you get the components, put them in the forge, with your crafted items and retry to add the properties. The forge should let you process and after some magical operations, your crafted item will be enchanted.