"This ingredient pack contains items needed to make many differed Expert recipes.
Ingredient Packs cannot be used with Bulk, Expertise , or Guild recipes.
Items made with Ingredient Packs automatically bind to your account."
Expert Ingredient Pack can be used in place of traditional ingredients. These can only be used on recipes in the Expert crafting tier. NOTE - Items crafted with Ingredient Packs are bound to account and cannot be traded to other players. Players must choose a profession from a Master of Apprentices before using an Ingredient Pack.
Items made using this can be given to an Alt on the same account but to no one else.