After the cotton cooled, he rinsed it again with water and let it dry, finally obtaining a De-fat cotton ball.
A De-fat cotton ball absorbed liquid more easily than ordinary cotton. It was odorless, tasteless, unblemished, white, and elastic, and not prone to bacterial growth, making it very suitable for sanitary cotton balls—for things like alcohol disinfection and so on.
At the same time, degreasing cotton was also very suitable for... cough, use as menstrual cloths.
If this news were to spread now, Li Ang definitely didn't want to be known by the somewhat strange reputation of "Gynecology Saint" before getting into the Academic Palace. At least, he'd wait until after he was admitted.
Inside the Academic Palace, there was a patent office where Doctors and students could register their inventions and creations.
