Story
Artisan Alchemist summoned you. Speak with Alphonse to learn the Alchemy Specialty Skill.
After completion (spoilers)
"I'll be observing to see how deeply you comprehend the marvels of mass and weight." Artisan Alchemist summoned you. One must pass the test in order to become an Artisan. For the test, you had to craft the Novice Alchemist's Scale. Pleased with the scale, Alphonse gladly approved of your work. Upgraded to Professional Alchemist.