Xiaohong bought back the lard and quicklime, and ran to Yang Fan's room with these things.

Chu Qingge saw it and wondered, "What is Yang Fan buying these things for?"

He Xiaoling was also at a loss, Yang Fan didn't care well for his injuries, but he bought this thing and came back, and he couldn't figure out what Yang Fan wanted to do.

Xiaohong came to Yang Fan's room, put things down, and asked, "Lord Yang, what are we going to do next?"

Yang Fan: "Go and refine this lard into oil, I'll be useful, and besides, just bring in a bucket of water and put it next to my couch." ”

Xiaohong nodded, and ran out to fetch water.

Xiaohong made a good water, put the bucket next to Yang Fan's couch, and then took the pork fat to refine the oil, she didn't understand what Yang Fan was going to do, she didn't ask, she did her own thing.

Yang Fan threw quicklime into the water, and suddenly there was a sizzling sound.

Quicklime turned into stone slurry and sank to the bottom of the water, Yang Fan took out the crystals suspected of being trona from the storage ring and threw them into the bucket, but unfortunately his body was not alive, and it was very difficult to stir.

At this time, Xiaohong ran in and said, "I'm already making a fire to refine oil, and I don't need anyone to guard it all the time." ”

Yang Fan smiled: "Thank you for your hard work." ”

Xiaohong bowed her head and said, "It's not hard, I'm very happy to stay here." ”

This is not false, although the life of Cuihong Courtyard is drunk and golden, but in that place, she feels that life is not like a person, but more like a plaything, whoever pays for it can spoil herself at will.

Yang Fan: "Help me find a wooden stick, and then stir the lime slurry in it." ”

Xiaohong obediently found a wooden stick and began to stir according to Yang Fan's instructions.

Yang Fan: "What we are doing now, no matter who asks you, don't say it." ”

Xiaohong was puzzled: "I don't understand what I'm doing, if Miss He asks, should I say it?"

Yang Fan: "No matter who it is, don't say it." ”

Xiaohong was happy in her heart, what Lord Yang is going to do now must be very important, but he chose himself, does that mean that Lord Yang has already regarded her as his own.

Xiaohong stirred for almost a stick of incense, and Yang Fan said, "It's okay, now let it sit for a while, and wait for the lime to sink completely." ”

Xiaohong nodded: "Then I'll go and see how the lard is refined." ”

Yang Fan had some expectations in his heart, if he could really get caustic soda, then making soap would be half the success.

Yang Fan doesn't know what the ratio is, but these can be verified step by step through experiments, and now what needs to be confirmed is whether the crystals on his hands can react with lard, and whether the things obtained by the reaction can be decontaminated.

After all the lime water sank to the bottom, Yang Fan asked Xiaohong to pour the solution on it into another bucket.

Xiaohong was very curious, but she strictly followed Yang Fan's requirements.

Yang Fan nodded: "Xiaohong, after refining the oil, brush the pot, and then take this bucket of water to boil until the water is boiled dry, at that time there should be some white powder left on the pot, use a porcelain bowl to collect the powder, remember, don't touch the water." ”

Xiaohong wondered, "What is that white powder?"

Yang Fan shook his head: "I don't know, you go first, maybe after boiling dry water, there will be nothing." ”

Xiaohong followed Yang Fan's request, and after the lard was refined, she put it in a jar, then brushed the pot, poured the bucket of water into it, covered the lid and started the fire.

He Xiaoling in the courtyard looked at all this suspiciously, then walked up to Xiaohong and asked, "Xiaohong, what are you doing here?"

Xiaohong shook her head: "The slave doesn't know, it was Lord Yang who asked me to do this." ”

He Xiaoling frowned and walked to Yang Fan's room.

Yang Fan was thinking about something, and didn't notice He Xiaoling walking in.

He Xiaoling opened her mouth and asked, "Yang Fan, what are you letting Xiaohong do? It's oil refining and boiling water." ”

Yang Fan smiled: "Do an experiment." ”

He Xiaoling: "What experiment?"

Yang Fan shook his head and said, "I can't say it for the time being." ”

He Xiaoling: "If you don't say it, don't say it, you can take care of your injuries." ”

He Xiaoling turned to leave, seemingly a little unhappy, but unwilling to attack.

Xiaohong boiled the water dry and found that as Yang Fan said, the surface of the iron pot was covered with a layer of white substance.

Xiaohong hurriedly found a porcelain bowl, scraped off the white substance, and put it into the bowl, there were several large bowls in total.

Xiaohong was a little puzzled in her heart, isn't this lime water, there are so many white things in it, it doesn't look like lime.

When Yang Fan saw the things in the bowl, he couldn't help but be overjoyed, he could react with the lime and turn it into the current thing, it seemed that his guess was not wrong, this was most likely caustic soda.

With caustic soda and grease, the next step is to make soap, Yang Fan asked Xiaohong to find all the tools to come over, and then locked the door to guide Xiaohong in making it.

Xiaohong didn't ask why, just did what Yang Fan said.

Xiaohong throws the white powder into the water and waits until it is completely dissolved, then pours the lard into it, and then stirs constantly.

The lard is mixed with the solution and the reaction begins.

Little Red thought it was amazing, the lard was constantly changing and becoming slimy.

After stirring for almost two quarters of an hour, Xiao Hong's hands were a little sour, and he said with a bitter face: "Lord Yang, how long will it take to stir?"

Yang Fan smiled: "Aren't you tired?"

Red nodded.

Yang Fan: "Go find a square box, pour the things you have mixed into the box and fill the box, and the task is completed." ”

Xiaohong finished all the work according to Yang Fan's instructions, put the box in front of Yang Fan's eyes, and said curiously: "What is this?

Yang Fan shook his head: "It's not for eating, you will naturally understand in the future, let's put it here first, you are also tired, go back and have a good rest." ”

Xiaohong shook her head and said, "I'm not tired, I'll be here with Lord Yang." ”

Yang Fan smiled: "You just said that you were tired, why aren't you tired all of a sudden?"

Xiaohong pouted: "It's just that my hands are a little sore." ”

Yang Fan suddenly said solemnly: "What I taught you to do today, don't tell anyone." ”

Yang Fan is still not sure whether this soap is made, if it is, this is definitely a way to make a fortune, although Xiaohong doesn't know about trona, but she saw the caustic soda that was boiled later, this production process is not complicated, but people in this era can't think of it.

Xiaohong nodded: "I won't say anything." ”

Yang Fan breathed a sigh of relief and said with a smile: "Do you want to come up and take a break?"

Xiaohong's face turned red, is Lord Yang going to accept himself? Although he is happy in his heart, but at this time, Lord Yang is injured, where can he withstand the toss.

Xiaohong said, "If you don't let the slave and maid serve you, you can just lie down." ”

Yang Fan was surprised: "I asked you to come up and rest, anyway, the place above is quite relaxed, you must be a little tired after doing so many things just now." ”

Xiaohong suddenly looked embarrassed, it turned out that she would be wrong, but she naturally would not let go of this opportunity to get close to Yang Fan, quietly climbed onto the couch, and then shrank in the corner and pretended to rest.