The boundary of Huaiyang Mansion is not too cold in winter, and there is ice in the river, but unfortunately it is far from being able to survive until the summer of the next year.

The ice from the wealthy families was brought in from further north and then stored properly. The cost is so high that it is not at all affordable for ordinary people.

Therefore, ordinary people who have a little spare money are reluctant to use ice to cool off.

And this incident made Lin Ruan see business opportunities.

Thinking of those cold and delicious cold drinks in his previous life, all kinds of iced juices, shaved ice, and ice cream, Lin Ruan couldn't help but drool.

In the summer without air conditioning, you have to rely on these things to survive!

Ice making is not a matter at all for Lin Ruan.

Anyone who has studied chemistry knows that this is just the most basic chemistry knowledge.

So Lin Ruan asked Lin Tiezhu to buy saltpeter and prepare to start making ice.

The process of making saltpeter ice is extremely simple, prepare a basin of water, add saltpeter powder to it, stir constantly, and then wait for it to react chemically and freeze.

When Lin Tiezhu saw that the water in the basin was freezing little by little in front of his eyes, his eyes widened: "Master...... Master...... What's going on? Are you going to ...... What kind of magic will it be? ”

Lin Ruan smiled and put the stick in his hand and said, "Don't panic, saltpeter will absorb a lot of heat when it encounters water, so that the water will cool down quickly, and then freeze, it is just a chemical phenomenon." ”

Lin Tiezhu felt that he couldn't understand a word of what his master said.

Lin Ruan was not embarrassed for him, turned around and took a few eggs, and began to make ice cream.

It's not difficult to make handmade ice cream, it just takes some time.

The first step is to make cream with egg whites, this process involves constantly beating the egg whites with a whisk until the egg whites are white and frothy, and then add a little salt, a spoonful of sugar, and a drop of white vinegar.

Lin Ruan didn't have white vinegar at hand, so he replaced it with lemon juice.

The matter of making ice cream cold drinks was planned by Lin Ruan a long time ago, so she asked someone from the trading house to bring her lemons back from Shudi.

The shopkeeper of the trading house was still very puzzled, saying that this thing was sour and astringent, and there was no way to eat it, and the people of Shu didn't eat this kind of thing, so he really didn't understand why Lin Ruan would spend a lot of money to let them buy this kind of thing.

However, the customers are the parents of food and clothing, and when the parents open their mouths, they naturally respond to their needs. So it took nearly two or three months for Lin Ruan to get ten baskets of lemons and a few saplings.

But this was all before, and Lin Ruan didn't make much effort, so it wasn't worth getting any more, right now, she just wanted to make this ice cream.

To make cream with egg whites, you need to keep beating for a few minutes, you need to add sugar again, then continue to beat for a few minutes, add sugar again, and repeat until the egg whites are beaten to a semi-fixed shape.

Dig a hole in the ice in the big basin and put a thick cloth at the bottom, and put the beaten cream in it to keep it fresh.

Turn your head and beat the egg yolk again, pour it into the milk that has been boiled and cooled with some painstaking efforts, add a large handful of sugar, and then beat it into a semi-solid form, and then bring out the beaten chilled cream, mix the two things together, divide them into several bowls, and then cut the fruits, strawberries, peaches, grapes, etc., into pieces, or mash them into puree, pour them into bowls, mix them with semi-finished ice cream, and finally close them, put them in the ice cubes, freeze them for half a day, and the ice cream is ready.

It's important to note that these ice cubes melt more easily, so keep an eye on them.

When the cold, delicious and fruity ice cream melted on his tongue, Lin Ruan had the illusion of returning to his previous life before the end of the world.

At that time, she liked to tinker with food when she had nothing to do, ice cream, a must-have dessert for summer, and that must be known. It's safe, hygienic and delicious, and I don't know how much better it is than the products on the assembly line that I bought outside.

Lin Ruan ate two large bowls in one go, making Tao Pozi frown: "Big girl, this ice ...... Ice unicorn, delicious is delicious, but it's too cold, and eating too much is not good for your body. ”

Lin Ruan waved his hand: "It's okay, it's not a matter of eating every day." ”

After saying that, he dug another spoonful into his mouth.

She knows how to make ice, but now there is no refrigerator, and the ice melts quickly, and it would be a shame if the ice cream was not eaten quickly.

Lin Ruan made excuses for himself, and while eating, he thought about how to keep the ice longer.

After all, she has already planned to open an ice shop, and if this problem is not solved, it will have a big impact. The infrastructure is not good, and there is still talk about opening a store and doing business.

Chemical protection, to put it bluntly, is heat preservation. As long as the temperature is not lost, the ice can be preserved forever.

In this era, wealthy families have to dig ice cellars to keep ice, not to mention the high cost, and it takes winter to put ice in. Naturally, she couldn't wait.

She has a better idea, which is physical insulation.

In my previous life, when I was young, those vendors selling popsicles in the streets and alleys generally used an iron box with a foam box inside and a bed of cotton wool outside, so that even if they ran in the sun, those popsicles could ensure that they would not melt for most of the day.

Therefore, she planned to build such an insulated room, a basement, and all the walls, including the floor and the top surface, were covered with thick cotton wool, and the same was true for the house above, to prevent heat dissipation. The ice products produced in this way are stored directly in the ice room, and they can be used and taken at any time, which is very convenient.

Lin Ruan had a plan in his heart, scooped the last bite of ice cream into his mouth, stood up contentedly, and decided to take time to go to Huaiyang Mansion in the past two days.

In the evening, Lin Ruan began to feel a little uncomfortable in his stomach, with a faint pain in his lower abdomen, and a little falling.

This feels a bit like a signal when a good friend from a previous life comes!

Lin Ruan rubbed his stomach, thinking that the imperial doctor said that day that after eating those medicinal foods of his, he could regulate his body. Counting the time, it's been almost a month, and she's going to be a good friend.

Lin Ruan felt that with the experience of her previous life, she didn't need to panic at all, and turned her head to ask Tao Pozi for a menstrual belt.

As soon as Tao Pozi heard her say that she wanted this, she hurriedly ran to the house and took out the menstrual belt that had been prepared a long time ago.

Lin Ruan looked at the somewhat inexplicable shape, full of question marks, this thing really works?

Tao Pozi thought that she didn't know how to use it, so she told her again, afraid that she wouldn't understand, and planned to tie it up for her personally.

Lin Ruan hurriedly waved his hand: "I'll do it myself." ”

She also enjoys being served, but she can't accept others to help her. After all, she is a person who doesn't even allow her mother-in-law to take a bath.

It took the things into the house and tossed for a long time before they were successfully tied up.