The practical exams in the twentieth week were quite unremarkable.
Zheng Qing felt that he could perform well in most assessments, except for alchemy. The candidates were required to use the Fire Cotton Glue Photo-Art invented by the famous alchemist Archer to take a clear photo of the synthetic beast they had previously crafted.
This photographic technique involved evenly spreading a layer of fire cotton glue on a glass plate, then immediately immersing it in a silver nitrate solution to enhance the plate's sensitivity. Since the drier the fire cotton glue, the lower the sensitivity, the plate had to be loaded into the camera for exposure while the glue was still wet — a process that only lasted a few minutes. If the photo wasn't successfully taken before the plate dried, it couldn't be developed or fixed.
