In his past life, Xu Lei hadn't yet created Soap.
For one, he didn't lack money, and for another, he hadn't fully grasped the production process back then.
Xu Lei remembered the general chemical principles for making Soap.
But some of the specific details were always wrong, and his attempts kept failing.
Over the past hundred-plus years, Xu Lei had experimented occasionally and had finally succeeded in producing it just a few years ago.
But since he didn't need the money, he figured he would market it whenever he was short on worldly cash.
Now that Zhi Jian and his family were in need of a source of income, however, Xu Lei felt there was no harm in giving it to them.
This way, whenever Xu Lei wanted to use it for bathing in the future, he could just buy it directly instead of making it himself.
The process of making Soap used limewater, lye, lard, and water.
First, the lye solution and lard were heated together while being stirred continuously.
