Improving an item with a temper increases the effective item level by 3. For example, a white quality Steel Greatsword at level 16 will, once improved with Honing Stones, have an effective item level of 19. Improving it again with Dwarven Oil, will make the effective item level 22. You will notice in the Weapon ・ Armor tables that the 上級 value at level 16 is the same as Normal at level 22. This is important to note, since several Crafted Sets have break points where their bonuses increase based upon "effective level".
- Note: The effective item level increases by 2 instead of 3 beginning at VR1.