Alchemical recipes come in five tiers: Lead, Tin, Copper, Silver, and Gold. Each has an increasingly difficult success rate for their recipes (unless otherwise stated), and recipes may require rarer and rarer ingredients!
Your dergons do, however, have the ability to level up in Alchemy. Just like Activities, completing a few alchemical recipes will give your dergon a leg up in the next one. Unlike Activities, however, not every Alchemy recipe requires art to go with it- adding art simply adds some bonuses to your recipe!
A Dergon can learn up to five levels of Alchemy, each of them increasing their success rate across the board by 10%.