"Raw materials: Beef and Mutton Oil, Pork Fat, tar, rosin..."
"Spices: vanilla oil, Rosin oil, Cowslip Oil, osmanthus oil, cinnamon oil..."
"Oil processing: pressing, filtering, boiling, saponification..."
Li Ang used more than a dozen sheets of paper, writing down the most detailed possible manufacturing process for soap. This covered everything from the selection of materials to the production tools needed, the protective equipment for the workers, and even the treatment of waste materials, waste slag, and wastewater.
Yu Country's handicraft industry was relatively developed. In Chang'an, Luoyang, and Su Hang, workshop owners were already purchasing land, setting up looms, and hiring workers to produce cloth in bulk.
The number of workers ranged from dozens to hundreds, or even thousands.
Each year, this brought a substantial amount of tax revenue to Yu Country. With detailed industrial blueprints, transitioning to producing soap was not particularly difficult.
