The question is, what are modern windows used for?

Glass.

This man-made natural transparent material is undoubtedly the best light-transmitting material.

Therefore, the windows of the house are made of glass, which can basically pass through all the rays of the sun. How bright and bright the house is!

At the same time, the glass also has a certain warmth effect, which is far beyond the reach of window paper.

Imagine someone shivering in the cold in a room made of window paper, and they can't see their fingers, and they can only rely on the weak flame for warmth.

And you sit in a room with glass windows, eating hot pot and singing, and you can still look at the scenery outside.

Especially when it rains, people have to worry about whether the window paper will be broken by the rain, and whether they can buy a few more window papers with the money they earn.

And you are still eating hot pot and singing, and even listening to the sound of rain leisurely, so comfortable.

Isn't this comparison coming out all at once!

So since the creation of glass, it has been the existence of crushed window paper!

Of course, it's not that Ningbei looks down on window paper.

It must have made sense when this thing was invented.

The main thing is that the opponent it has to fight against is too perverted.

is so perverted that Ningbei can't even think of a word that can praise the window paper.

If you insist on saying it, it may be convenient to be spied on......

Providing a wealth of hands-on experience for teenagers?

And it's not soundproof...... cough cough cough ...... To get back to the point, although Ning Bei had long planned to make glass, he didn't plan to use it for its real purpose in the first place.

The hustle and bustle of the world is for profit, and the hustle and bustle of the world is for profit.

Ning Bei traveled to ancient times with the original intention of wanting to be a rich man, and in a fair and reasonable way, he would definitely choose the one with the greatest profits!

Make money without breaking the law!

Glass is also known as artificial crystal, artificial glass.

Unless it has been identified, ordinary people can't see the difference at all.

And because of natural growth, there are many impurities in crystal and glass, but glass does not.

Therefore, since the glass is made, it must be 'cleaner' than crystal glass.

But one is natural and the other is man-made.

That's why the price difference is so great.

Even in modern times, the price of both is heaven and earth!

A little crystal glass may be able to exchange for several tons of glass......

It can only be said that the moment the glass is made, it is to better serve the people.

Moreover, when the glass was made, a series of identification methods had already been developed.

Therefore, in modern times, glass is passed off as glass and crystal, just like Tsingtao beer bottles are passed off as jade, and people with a discerning eye can see it at a glance.

The wide variety of modern identification instruments will not be used to you.

But in ancient times, there were not so many identification methods, and there were no identification instruments.

So after Ningbei crossed the Tang Dynasty and made glass, he said that this was glass and crystal, who would dare to refute it?

Could you please come up with proof?

And the impurities of glass are less than that of crystal glass.

Which one is a fake?

We don't know yet!

I believe that most ancient people will choose crystals and glass with more impurities!

Those powerful and even royalty must have preferred glass with fewer impurities, or almost no impurities.

And compared with the already expensive crystal glass, the cost of glass is extremely low, and it can even be described as no cost.

Quartz sand, borax, boric acid, barite, barium carbonate, limestone...... These can be used as raw materials for glass.

But in the eyes of the ancients, these materials were just useless 'stones'.

Usually when they dig iron ore, gold ore, crystal ore, glass ore, they will have a lot of this kind of 'stone'.

The ancients didn't know the value of these stones, so they just tried to get rid of them.

If Ning Bei said to help them deal with these stones, not only would they not ask for Ning Bei's money, but those who felt that their conscience was not going to go would even have to give Ning Bei some money!

After all, in their opinion, Ningbei helped them dispose of these useless stones, and it was also appropriate to give Ningbei some tips.

Therefore, Ning Bei can basically obtain these raw materials at zero cost, and he doesn't even need to mine them himself.

If you have to say what his cost is, it may be labor costs.

However, compared to the glass profits that can no longer be earned, this cost is basically negligible.

The blood-making business that Ningbei said before is also glass!

As long as he makes glass, the quantity sold at the beginning is smaller, and the price will definitely be as good as crystal and glass.

No, the price of cleaner glass is even higher than that of crystal and glass!

When the big men got tired of playing with glass, he started mass-producing glass and applying it to windows.

I believe that by that time, those big names will not be too resistant.

It's a big deal to produce more beautiful glass products and sell them to the rich and powerful at a high price.

Then we will produce some glass with more impurities and sell it to the people as windows at a low price.

Even if the glass with more impurities still hangs the window paper, it can still transmit light.

If you die, you will give the glass with many impurities a name of 'glass', which will be separated from artificial crystal and artificial glass.

In the propaganda of glass is the leftover material of "crystal" and "glass", the value is far better than that of not "crystal" and "glass".

Doesn't that solve the problem on both sides?

Those big people like to have treasures that ordinary people can't get!

This is man's most instinctive vanity.

But Ningbei also takes advantage of this in order to maximize its own interests!

And both sides are satisfied, benefiting both the rich and powerful, as well as the common people.

At that time, the rich and powerful royal families were satisfied because they had obtained rare treasures.

Ordinary people are also satisfied because they live in a translucent and white house.

And Ningbei has made a lot of money, so he is naturally very satisfied!

In the end, this glass business is also a win-win situation!

With the addition of the audience in the live broadcast room, Ningbei's preparations for the direction of 'living' were almost the same, and he also took some notes about 'line' by the way.

Looking at his full notes, Ning Bei showed a satisfied smile.

Now he only needs to finish the rest of the 'line' and 'use', and everything is handled properly.

As long as you memorize all this knowledge, you will really have no worries about food and clothing when you travel to the Tang Dynasty!

In fact, if these technologies are taken out and thrown to the craftsmen of the Tang Dynasty, they can make earth-shaking changes in the Tang Dynasty!

If all of them are learned by one person, then it will be difficult for this person to lie flat and not make money!

What's more, Ningbei still wants to make money!

Then he is even more handy when he starts these businesses!

Just when Ningbei was about to strike while the iron was hot, hurry up, and ask the audience about improving travel, a red light rose from a distance and stuck to Ningbei's forehead.

Ning Bei couldn't help but look up into the distance.

Immediately, he became ecstatic.

"Audience friends, you can enjoy the most beautiful sunrise next!"