Take the Magic: The Gathering 'What Color Are You?' Quiz.
Emulation requires a UMD check as part of the Artificer class feature Item Creation (Ex). Artificers can normally emulate a caster level up to their Artificer class level +2.For example, an Artificer3 could make a scroll of fireball, a level 3 spell requiring caster level 5. [i}Arcane eye[/i] requires caster level 7 (Artificer5 to emulate), meaning Artificers should get Craft Homunculus at level 5 or drop the arcane eye prereq.