"Well, that's it!" Ye Xipo smiled softly.

In fact, many things are like this, and it is so simple that people can't even think of it.

There is a real example of this, in the later nineteenth century, when the craft of glass making was still immature, and there were often air bubbles in the glass, and only the glass made in a small German factory had no air bubbles.

The large factories of the same country consume iron funds to engage in scientific research, and the research comes and goes, but the research does not come. Later, when the small factory opened its doors to the public, they only knew one more process: stirring a few with sticks.

The same is true for salt making, using charcoal to absorb the bitter marshals in the sea salt and remove the odor, which is only a super simple method, and the Tang Dynasty people don't know it.

Ye Xipo suddenly realized that for me, this might be the best time to go!

It's not that I'm smarter than all the Tang people, but they are all restricted and confined by the time of the Ignorance.

There are many things they have never seen, they can't think of, they don't understand, and they lack knowledge reserves, so most of the time they are covered by a layer of window paper, and their thoughts and ideas are limited.

However, I came from later generations, and I have more than many years of insight and wisdom than the people of this period, and my way of thinking and perspective are all different from those of the ancients, and I am complete and unrestricted.

The water in the kettle gradually evaporates and cleans, leaving a thick layer of fine salt as white as snow at the bottom of the kettle, which is finely made of fine salt.

Feng Yuanying couldn't wait to pick and try again, and then the whole person fell into a state of madness, and his whole body trembled as if he had touched electricity.

"Haha, with this method of making salt, the dilemma of a certain Gaopan and Pan states can be easily solved, and the annual tax of 70,000 yuan can no longer be difficult for us!" The ecstatic Feng Yuanying grabbed Ye Xipo's arm again and shook it vigorously.

"Isn't so-and-so dreaming? San Lang, I really don't know how to thank you, please accept Yuan Ying's worship! As he spoke, he really knelt down and bowed respectfully.

Ye Xipo grinned and rubbed his arm, helping him up, and didn't tell him about the candy making in his heart, so as not to let this guy get stimulated and grab his arm again.

"This is nothing, with this method, you can also make white sugar that is ten times better than frosting sugar."

Ye Xipo originally wanted to keep a low profile, but Ye Xuan on the side took the lead in saying that he had come to see it.

Yesterday, the grilled fish was cooked, and it used to be slightly spicy, but some people still felt that it was a little too spicy, and Ye Xipo thought of it sweet and spicy.

Of all the spicy flavors, sweet and spicy are the mildest, with needles hidden in the cotton, which is the least irritating to the mouth, but can also be addictive.

However, there was no white sugar in the store, and when I asked, I knew that the best and most expensive sugar in Datang was the frosted sugar produced in Lingnan, which was sold for more than 300 wen per catty, while the brown sugar was only sold for 25 wen.

So Ye Xipo thought of using charcoal and brown sugar to process white sugar, and the result was a success.

Still immersed in the grand joy, Feng Yuanying reacted, stared at Ye Xuan with wide eyes, and asked, "How much white sugar can a pound of brown sugar consume?" ”

Ye Xuan thought about it: "Eleven or two." ”

Feng Yuanying's eyes rolled twice, stunned, and after a long time, he reacted and screamed miserably: "Oh my God, let's get it!" ”

Then he sat down on the ground and almost didn't pass out.

Ye Xipo felt a burst of disdain in his heart, and he was really crazy.

"What is this white sugar, take a look." After a while, Feng Yuanying calmed down, climbed up from the ground, and asked.

Ye Xuan found the paper bag containing the candy and flipped it over.

Feng Yuanying took the paper bag and flipped it open, carefully looked at the white sugar on the paper, only to see that it was as white as snow, crystal clear and ordinary as fine sand, complete without the slightest miscellaneous, twisted a handful and sniffed it under his nose, and could smell a very good smell of sugar.

Feng Yuanying raised the white sugar, like Xiaoice hail falling to the ground, with a rustling sound; When you put the remaining white sugar in your mouth, you immediately feel a pure sweetness on the tip of your tongue.

He couldn't help but shout: "Well, it's so sweet! If there is really no bit of miscellaneous, it is good to sell the appearance, white as snow, and it is really ten times better than frosted sugar. ”

"That's it!" Ye Xuan was very complacent, as if the method was what he wanted to do.

Feng Yuanying sighed and sighed: "Originally, I thought that frosted sugar was the best sugar in the whole Tang Dynasty, but I didn't expect that there was even better white sugar in the world.

Compared with white sugar, this frosted sugar is almost dregs! ”

After speaking, Feng Yuanying took a packet of icing candy from the baggage he brought and put it on the table, originally thinking of bringing something good to visit relatives, but he didn't know that it became a textbook for memorization.

Ye Xipo opened the paper bag and found that the so-called frosting sugar was actually light yellow in color, at least not the paper white that wrapped it.

I also put some in my mouth, and it was indeed very sweet, but there was a kind of earthy smell in the sweetness, and when I tasted it seriously, I felt that it was difficult to eat.

Ye Xipo frowned slightly, and asked puzzledly: "I don't think the taste of this frosted sugar is much better, and the color is not white enough, why is the price more than ten times worse than brown sugar?" ”

"This ......"

Feng Yuanying wanted to know about it and replied: "Due to the low production of frosted sugar, with the same cane juice, the consumption of brown sugar can consume five catties, and the consumption of frosted sugar is less than one catty; Moreover, it is time-consuming and laborious, and it also requires very skilled technicians to control the heat and adjust the yellow mud water.

It's like boiling sugar, even if there is only one less fire, it will boil the sugar into stubborn sugar, full of foam and will not crystallize; But if you boil more fire, the sugar taste will become bitter, and the color of the frosting sugar will also become darker, so ......"

After Feng Yuanying finished his lecture on the art of frosting and candy, Ye Xipo was almost shocked to see that there was such a backward and ridiculous technique.

This technique is called the yellow mud water sugar method, which simply put, after the cane juice is pressed, a certain amount of lime is involved, and then the cane juice is boiled in a pot to a certain concentration, and the color changes to black and brown.

Then put the boiled sugar in a barrel, let the sucrose in it gradually cool and crystallize into particles, and the miscellaneous substances react with the lime as early as the boiling time to form black slag, and the sucrose crystallization is separated.

Then pour the cooled and crystallized sugar paste into the tile slip (pottery drain), pour yellow mud water from above, and use the yellow mud water as an adsorption decolorizer, one side of the noodles flows through the sugar block to adsorb away the black residue, and the other side of the noodles to decolor the sucrose.

This is indeed possible to obtain the kind of white sugar that is close to that common in later generations, but the defects are also too obvious.

First of all, the black scum made of lime contains a lot of sugar. The crystallization efficiency of sucrose is also too low, and many sugars that have not crystallized have been swept away.

Secondly, the adsorption and decolorization of yellow mud water is too poor, the decolorization is incomplete, and it will make the frosted sugar have an earthy smell.

Ye Xipo had read in a book in his previous life that the fish in the pond would smell earthy, mainly due to the presence of cyanobacteria and green algae.