Ok, thanks an example would be: A normal robe would be say Dura 47/50 and say mine is Dura 7/10 but i want the Dura 7/10 back up to 7/50Dura orb will increase the maximum dura if that's what you mean
If armour is under lvl 190 you can dura orb it up to 15 if no prior orbs have been added previously
If over 190 you can add up to 18 if you use the Kevin in Elysian welcome hall and the quest oils from mongchon to make ultra dura orbs but same rule applies any prior orbs added may effect you plus total