Item Creation Feats

Item Creation Feats do not require an XP cost. Instead, they require a Spellcraft check with a DC equal to 5 + the caster level for the item. This check is made at the end of the crafting time. Failing this check means that the item does not function and the materials and time are wasted. Failing this check by 5 or more results in a cursed item.
Note that all items have prerequisites in their descriptions. These prerequisites must be met for the item to be created. Most of the time, they take the form of spells that must be known by the item’s creator (although access through another magic item or spellcaster is allowed). The DC to create a magic item increases by 5 for each prerequisite the caster does not meet. The only exception to this is the requisite item creation feat, which is mandatory. In addition, you cannot create potions, spell-trigger, or spell-completion magic items without meeting its prerequisites.
Magic supplies for items are always half of the base price in gp. For many items, the market price equals the base price. Armor, shields, weapons, and items with value independent of their magically enhanced properties add their item cost to the market price. The item cost does not influence the base price (which determines the cost of magic supplies), but it does increase the final market price.
The creator also needs a fairly quiet, comfortable, and well-lit place in which to work. Any place suitable for preparing spells is suitable for making items. Creating an item requires 8 hours of work per 1,000 gp in the item’s base price (or fraction thereof), with a minimum of at least 2 hours. The character must spend the gold at the beginning of the construction process. The caster can work for up to 8 hours each day. He cannot rush the process by working longer each day, but the days need not be consecutive, and the caster can use the rest of his time as he sees fit. However, by increasing the DC to create the item by 5, the character can cut the crafting time in half. The character can increase the DC by 5 as many times as he wishes in this way, each time cutting the crafting time in half. Note, a minimum of 2 hours is still required to create an item.