Throw an Acid Bottle at your opponent with a small chance to break their armor, and inflict the external bleeding status. This skill ignores armor defense, and hits regardless of Flee.
VIT defense is calculated in, however. While the damage can be blocked by Pneuma, the chance to break armor remains. Kyrie, however, blocks both the damage and the chance of breaking armor, as well as a Crusader with Auto Guard.
A successful armor break calculation makes the target use the /omg emoticon. That doesn't automatically mean they had their armor broken; even when using the Chemical Protection Armor skill or wearing an Immortal armor, the /omg will display itself so long as the attack was considered a success.
Just like Demonstration, the damage is increased via +ATK cards, and status and +% cards have no effect. It's also unaffected by elements. The Acid Bottle is consumed at the beginning of the cast, as opposed to the end like the other potion skills.
This means that if you are interrupted while casting, the bottle is lost with nothing to show for it. Damage is (100+40*SkillLV)% ATK.

Flings a bottle of acid at an enemy that has the chance of damaging the target's Armor or causing the Bleeding effect.
Damage increases with the skill level of Learning Potion and the chance to inflict Bleeding is reduced by the target's immunity.
Consumes 1 Acid Bottle.