After Zhu Houzhao taught the Eight Tigers the correct business model, soap, a fresh chemical product, finally became popular in the capital.

Not only Wei Bin's Wei Ji shop, but also Qiu Ju, Luo Xiang, Liu Jin and other shops basically sold out in a short period of time.

The shops had to increase their orders, and the Royal Industries soap manufacturing team became extremely busy.

Under Zhu Houzhao's original arrangement, there were only ten eunuchs involved in making soap, but now Zhu Houzhao has added twenty eunuchs to participate in soap making.

As soap became more and more popular in the capital, more and more shops came to order directly from the Royal Industrial Company, and even in the end, there were long queues of soap vendors who ordered soap in bulk.

"Emperor, at first, Weichen begged those shops to buy goods, but now Weichen doesn't have to ask for it, one by one they are scrambling to order, and even paid a deposit in advance, and now even the deposit is more than 4,000 taels", Wei Bin said to Zhu Houzhao excitedly.

Luo Xiang also said: "Emperor, now there are more people buying soap, and our raw material procurement is also a lot more, because we are purchasing more and more, and those who sell alkaline noodles and lime are willing to reduce the price for us, and now we can make a lot more money by selling a piece of soap." ”

Qiu Ju also said: "Not only that, the soap trade has been opened, and the eunuchs who make soap in the Royal Industrial Experimental Base are also a lot more active, they also have shares now, and they know that they can make more money by doing more, and they are working overtime one by one, and now they can make more than 10,000 pieces of soap every day." ”

Zhu Houzhao just smiled faintly when he heard it: "This is just the beginning, you don't have to be happy too early, it's just a profit of a few pennies for a piece of soap, and when you have tens of thousands of taels of profit a day in the future, it's not too late for you to be happy, the manufacture of glass can't be slow, this soap is crazy to rob the trend will expire, after all, people who buy soap can't buy soap anymore, we have to think of other ways to make more money." ”

As soon as Zhu Houzhao said this, Qiu Ju, Luo Xiang, Wei Bin and other Eight Tigers also hurriedly said yes, and they no longer had any resistance to their emperor wanting to make glass, in their current opinion, the new glass that the emperor wants to make must be able to make money.

The reason why it is said to be new glass is because there is no glass in this era of Daming, but now the glass produced by Daming is not large and generally cannot be transparent and colorless, and the glass that Zhu Houzhao wants is transparent and colorless, and it should be able to blow into all kinds of glass containers and low-cost large pieces of glass that can build greenhouses.

Zhu Houzhao first asked Qiu Ju to find a craftsman who could build a glass-making kiln, and built a glass-making kiln on the Royal Industrial Experimental Base, the former Royal Xiyuan Rabbit Mountain, and also rebuilt the crucible.

Burning glass from a crucible can be fueled directly with coal with a higher combustion value.

The crucible can isolate the sulfide in the coal from the contamination of the glass liquid.

In addition, Zhu Houzhao also had graphite smeared on the bottom of the crucible, so that it could be evenly heated when heated with the crucible.

Graphite does not exist in the form of compounds in nature, and it is not difficult to mine, and it can be purchased on the market.

As for the raw materials for refining glass, they have also been improved, and not only basic materials such as quartz, limestone, and feldspar have also been used for soda ash, color removal and oxidants.

Soon, Zhu Houzhao refined the colorless molten glass with the help of the skilled old craftsmen of the glass factory, and then naturally just directly put the molten glass on the mold, the large pieces of glass are fine, and they are evenly spread directly before the molten glass solidifies, but it is not easy to get the standard experimental glass instruments.

The weights and measures of this era were different from the basic units of measurement of later generations, and Zhu Houzhao had to use the data relationship conversion between the current popular weights and measures and the basic units of measurement of later generations to determine a standard unit of measurement of the glass experimental instrument mold according to his memory.

For example, a 250-milliliter volumetric flask and a 500-milliliter beaker before directing the craftsmen to blow according to his instructions.

In the Ming Dynasty, it was naturally impossible to achieve mechanical blowing, and could only be manually blown, that is, the molten glass was placed in a mold and blown while turning with a metal blowpipe, and then a large number of glass experimental containers with quantitative significance could be manufactured.

With glass experimental instruments, Zhu Houzhao was much better at preparing solutions and carrying out quantitative chemical reactions, so he specially asked Qiu Ju to build another laboratory in the Royal Industrial Experimental Base, and directly named it the Chemical Laboratory.

Zhu Houzhao is going to further develop new chemical products in this chemical laboratory, the main ingredient of soap is glycerin, and glycerin can not only be used to improve the skin, but also a very important chemical raw material, and now Zhu Houzhao will react glycerin with nitric acid to make nitroglycerin.

Nitric acid is naturally not difficult, now the Ming Dynasty has gunpowder, there will be saltpeter with gunpowder, and it is not a problem to make nitric acid with saltpeter.

Qiu Ju now also has a great interest in chemical industry, following Zhu Houzhao not only familiar with the soap production process and even knows a lot of chemical knowledge, and even Zhu Houzhao will take the initiative to teach him some, and now Zhu Houzhao will let him be responsible for the preparation and purification of green alum, that is, to make concentrated sulfuric acid.

Because to make nitroglycerin, you need to make nitric acid, and the easiest way to make nitric acid is to react with concentrated sulfuric acid and saltpeter to produce nitric acid, but nitric acid and sulfuric acid are both strong acids, which are very dangerous.

Qiu Ju was very serious under the command of Zhu Houzhao to use distillation to boil the green alum into concentrated sulfuric acid, and then quantitatively reacted part of the concentrated sulfuric acid with a determined concentration of sodium hydroxide solution, so that the concentration of the obtained concentrated sulfuric acid could be determined.

Finally, a concentrated sulfuric acid solution of a defined concentration of 250 milliliters was prepared.

Zhu Houzhao was very pleased with this, and couldn't help boasting about Qiu Ju: "Very good, now the whole world is estimated to be able to determine the volume and prepare the solution except for me, in addition, among the three acids and two alkalis, you can already make one acid and two alkalis, just by virtue of this, I will definitely give you more than two grades in the future, because you are now worthy of the title of the great chemist of the Ming Dynasty!" ”

Qiu Ju was very happy after hearing this, although he didn't know what a great chemist was, but he knew that the treatment of Zhengerpin was very top-notch, there were few people in the Ming Dynasty, and it was his dream to become a top-level person, so he couldn't help but be more active in obeying Zhu Houzhao's arrangement to continue to prepare nitric acid.

Under the command of Zhu Houzhao, Qiu Ju first put the concentrated sulfuric acid into a gooseneck flask with gravel, then put it on the barbed wire to heat, and then poured it into the glass reactor, when the concentrated sulfuric acid was hot, add saltpeter, and then slowly stir until the saltpeter completely melted and precipitated, Zhu Houzhao asked Qiu Ju to stop adding saltpeter, and then prepared nitric acid.

It didn't take long for Zhu Houzhao to take the nitric acid that had been set from Qiu Ju's hand, and couldn't help but praise Qiu Ju again: "Good slave!" Now three acids and two alkalis, you have learned to make two acids and two alkalis, but you have to make persistent efforts, according to the plan I gave you, the nitric acid and glycerin reaction, if you can make nitroglycerin, I will reward you with 10,000 taels of silver on the New Year's Day, and award you the honorary title of the highest royal scientific award! When the time comes, I will personally present you with an award in the Qianqing Palace! ”

Under the popularization of Zhu Houzhao, Qiu Ju knew the compounds of nitric acid and glycerin, and also heard Zhu Houzhao say that nitroglycerin made from nitric acid and glycerin is a miracle drug that can treat angina, but Zhu Houzhao did not tell him that this nitroglycerin is also an explosive, so he still has a good fantasy about nitroglycerin now, especially now that Zhu Houzhao said that if he can make nitroglycerin, he will give him 10,000 taels of silver and an award or something, so he is excited: "The emperor can rest assured, the slave will definitely make nitroglycerin for you!" ”