Crafting is the ability to make new items from component items. There are 33 craft skills available to learn and no limit to how many a single player can learn at once. Craft skill ability is measured by a player's craft skill level, ranging from one to 140. The higher a craft skill level, the more items a player can craft from that discipline.
Craft skills can be improved by gaining craft experience. Craft experience can be acquired through personal crafting (at a rate of 1xp point per every full multiple of 50 workload required to complete the craft), guild crafting (1xp for every 100 craft contribution), dismantling of items, analysis of items(as dismantling, but can do it only once a day, more if atlas ore used in diary, seems to give the same xp as crafting the item times a coefficient related to it's enchantment bonus and multiplied again by a random factor between 1 and 20) or teaching skill levels from a given discipline.
Craft skills do not increase in level automatically upon obtaining enough experience. Instead, experience continues to accrue until the level is increased manually, either by learning from a crafting NPC or a player who is at least one tier higher.
Craft levels are grouped into named tiers as shown in the table above. Except for apprentices, each time a player reaches a new crafting tier for a given craft skill, the player is granted the ability to teach other players the levels contained within that tier. For example, an artisan (artisian = lvl 11-20 in a skill discipline) can teach players that craft skill up to skill level 10. Teaching a craft skill grants experience to the teacher, depending on the level taught.