In general, this is an extremely backward, extremely expensive, and extremely inefficient technology, but due to time constraints, this is still one of the most sophisticated technologies in Datang, and half of it is still begged by Ye Shimin from Tianzhu for a lot of money.

The Tang Dynasty also stopped the technology monopoly on this technology, and Feng also met a Tianzhu sugar boiling master by chance, and recruited an apprentice from the Guangzhou Sugar Workshop, which obtained this technology.

It's funny to say, but it's true.

Ye Xipo couldn't help but feel inferior, the top technology that the Tang Dynasty and the Feng family regarded as treasures was almost scum in front of me, a traverser.

"How to make white sugar, let's show it again." was complacent, when he heard Feng Yuanying ask.

"There's no brown sugar at home." Yexi ramp.

"This ......"

Feng Yuanying was stunned for a moment, and wanted to tell the family to ride a horse to the town again to buy some brown sugar, Ye Xipo suddenly thought: "But you can use sugarcane juice directly." ”

Everything else is ready-made, but sugar cane juice has to be freshly squeezed.

The sugar industry is a pillar industry in the two states of Gaopan, sugarcane is planted in every family, and the two states are planted with white-skinned cane specially for sugar extraction, which needs to be grown for ten to eleven months, usually planted in mid to late February, and harvested after the Shangyuan Festival in the following year.

Ye Xuan brought ten sugar canes from the cellar, and Ye Ren asked Cao Lizheng's family to borrow a wooden juicer.

Ye Xipo stood in the courtyard and looked at the juicer with great interest.

The base of the juicer is like a common bench in later generations, one end of the bench has two legs stretched upward, and there are beams to make a shelf, and the main body of the juicer is under the shelf.

The "bench" shelf has a copper depression at the bottom of the shelf, and under the shelf is a long handle, and at the other end of the handle is a copper-clad protrusion, which looks like a spoon or a cigarette stick.

When squeezing sugarcane juice, first cut the sugarcane into small sections, then put two pieces at a time in the depression, and press the long handle vigorously to squeeze the sugarcane juice out and flow out along the groove on the outside of the "bench".

I'll go, the design is quite ingenious, but this kind of human juice doesn't tire people to death? No, just squeezing ten sugarcanes will make Ye Kun and Ye Xuan, two middle-aged people in their twenties, tired enough.

"Uncle, is your frosting workshop also juicing like this?"

"Well, how can you squeeze it without squeezing it like this?"

Ye Xipo frowned slightly, relying on people to squeeze the juice by hand, and it is squeezed in two sections, which is too inefficient and too labor-intensive.

Ye Xipo felt that he had found a way to make money again, improving the juicer, changing from manpower to animal power or water power, and only being able to squeeze two knots at a time should be changed to being able to squeeze a lot.

In this way, it can not only greatly improve consumption efficiency and liberate manpower, but also consume juicers and sell them to other juice mills at a high price.

In Ye Xipo's previous life, he majored in mechanical manufacturing and automation, and majored in business administration, and just thought about it casually, he thought of two or three ways to squeeze the juice, which was at least ten times more than ten times more efficient than this.

Just thinking about the good method of juicing, the juice was squeezed, and the ten sugarcanes squeezed most of the cane juice in half a bucket, and Ye Xipo lifted it, and the barrel with juice weighed about forty catties in later generations.

"Let's go, let Uncle see your sugar making method." Feng Yuanying picked up the wooden barrel from Ye Xipo's hand and walked into the house.

"Wait a minute, it's not over yet." Ye Xipo pointed to the bagasse in the wooden basin and said, "These bagasse can be squeezed a second time." ”

"It's all drained, and I can't squeeze it anymore." Ye Xuan shook his somewhat sore arm and said.

Ye Xipo looked at Feng Yuanying and asked seriously: "Uncle, is it also like this in the frosting workshop?" ”

"yes, what's going on?"

Feng Yuanying felt very strange, first, he felt that Ye Xipo's question was very strange, and second, he felt that this nephew seemed to be a different person, and his demeanor was different, just like ...... It's like an adult.

Ye Xi's slope didn't feel this, he said to himself: "In fact, there is still a lot of sugar in these squeezed bagasse, of course, you can't squeeze the juice directly, you can pour warm water into the wooden basin, soak it for a while, and then squeeze it, and you can squeeze it out." ”

"yes, it's still Saburo smart." Fourth Uncle Ye Xuan patted his head and said happily.

"Let's make sugar from this cane juice first."

Everyone went into the house together, poured the cane juice into the kettle and boiled it on the stove according to the method of making refined salt, and poured in the charcoal crumbs smashed into the size of soybeans, and quietly stirred with a wooden stick.

As if a trick, the light yellow, milky white sugarcane juice gradually becomes transparent, and when the cane juice temperature is heated to about sixty or seventy degrees, Ye Xipo makes people stop adding fire, continue to stir for a while, and the sugarcane juice becomes as transparent as clear water.

After straining it with a fine linen cloth three times, the filtered water became extremely clear, Ye Xipo scooped it with a spoon and tasted it, the sweetness was very pure, and there was no miscellaneous taste.

"That's it, if you continue to boil, you will boil out crystal white sugar, no positive color, no miscellaneous taste."

Feng Yuanying saw that the cane juice had really become as pure as water, and his eyes lit up, and he could once imagine what the white sugar would look like.

He was so impulsive that he trembled a little, he didn't expect that with such a simple method, he could consume white sugar ten times better than frosted sugar.

The color of the frosting is not white, and the taste is earthy, and it can be bought for more than 300 yuan, and even 400 yuan a pound in Chang'an.

The quality of white granulated sugar is ten times that of frosted sugar, complete without a trace of positive color, crystal white, without a little miscellaneous taste, which has to be sold for a few pennies a pound, which is much sought after by rich people!

Feng Yuanying once imagined that after such a white sugar came out, it would be sold out.

When Feng Yuanying was thinking about it, Ye Xipo was staring at the syrup in the kettle that was getting thicker and thicker in a panic.

He is not a sugar boiling master, and he doesn't know how to look at the heat, but he knows that if the white sugar water is boiled dry and continues to heat and heat, it will have a charring reaction, and the color will turn red and black, which is how the sugar color of the braised pork comes from.

So as soon as the water vapor became less and less, and the syrup bubbled violently, Ye Xipo immediately ordered the kettle to be served, and then asked someone to find some shallow plates, and spread the extremely thin sugar paste in the kettle on these shallow plates.

"Wait half an hour, wait for it to cool and solidify."

Everyone looked at the complete white and transparent sugar paste, and they were not anxious, Ye Kun and Ye Xuan were very interested, and continued to squeeze the sugarcane juice for the second time, and then continued to boil the sugarcane juice, and the others sat in the hall chatting and talking.

Feng Yuanying's most curious thing was how Ye Xipo could know such a clever sugar making method.