The wicked female cannon fodder has arrived home

Jin Tiantian set out an electronic scale accurate to 1g in order to precisely weigh the ratio of oil, alkali and milk.

The container for dissolving alkali is a heat-resistant porcelain bowl.

Dissolving alkali requires a container that can withstand strong alkali and high temperatures of at least 100°C, as well as a stainless steel chopstick as a stirring rod.

Also prepare a stainless steel basin with a capacity of more than one liter to hold the soap liquid.

A silicone spatula for stirring the soap.

Finally, I prepared a one-liter milk carton to make the mold.

"We make cold-process soap, so we don't use pots and pans, which are difficult to remove from the mold."

“Be sure to prepare all the ingredients and tools in advance before making it.”

“Avoid being unprepared and causing chaos.”

"The first step is to dissolve the sodium hydroxide."

"That's sodium hydroxide."

“The moment it dissolves, the temperature soars and white alkaline vapor emerges.”

"So when we dissolve alkali, we must be in a ventilated place and wear masks and gloves."

Not only was Jin Tiantian fully armed herself, she also provided gloves and masks for Lan Ruanmei.

"Sodium hydroxide is a strong base, so be careful not to get it on your skin. It is corrosive."

Xie Yu watched from afar and couldn't help but feel curious when he heard the sound.

"Sister, what is this sodium hydroxide? How can we make it without it?"

Jin Tiantian didn't even turn back.

"Do you know where there is a saline lake? If so, you can go find some natural alkali. The main ingredient is sodium carbonate. Sodium hydroxide is made by adding lime to melted water."

"If you don't have any, burn some wood ash, add water to dissolve the potassium carbonate, then add lime to prepare a potassium hydroxide solution and make liquid soap. You can use it as shower gel or dishwashing liquid later."

"I've calculated that two pounds of wood ash can roughly saponify one pound of lard."

Xie Yu was confused.

"Sister, I still don't understand a lot of the words you said, and I'm very confused."

Jin Tiantian let out a breath and gave a concise summary.

"Then mix the lime milk with soda ash, filter out the precipitate, and that's what's left."

After saying that, he ignored Xie Yu and focused on teaching Lan Ruanmei the production process.

"The recipe for this soap requires 64g of sodium hydroxide."

"That's the number shown on this scale. It's the Arabic numerals I taught you."

Lan Ruanmei was full of curiosity. It turned out that this number could be used for weighing.

"Then pour in purified water. If you don't have purified water, boiled water will do."

"Always use cool water, never heat water, otherwise it may cause splashing, which is very dangerous."

"Adding water to sodium hydroxide generates a lot of heat and produces steam."

"Be very careful when blending to avoid inhaling the steam or getting burns or splashes on your skin."

"Once lye splashes onto your skin, wipe it off with a paper towel immediately, rinse it with running water, and then spray it with vinegar."

"As long as you deal with it quickly, you won't get burned."

"At this time, you can get a basin of cold water to cool down the lye."

"We need to get the lye down to room temperature before we can proceed to the next step of saponification."

"While the lye solution was cooling down, we made a simple mold out of a milk carton."

Jin Tiantian cut off the top of the milk carton, rinsed the inside, and got a simple and practical mold.

“When the lye solution drops to room temperature, which is the hot and cold feeling we have in our house now, we will weigh the rice oil.”

"Cold manufacturing requires very high temperature control, and this formula must not be heated too high."

From time to time, some fresh words come out of Jin Tiantian's mouth.

Everyone only understood half of what was said.

Only by relying on real practice and self-understanding can one barely keep up with the pace of Jin Tiantian's tutorial.

"It's fine if both the oil and the alkali are at room temperature."

"See this number? Remember the number 500."

"After weighing 500g of oil, people with dry skin can add another tenth of oil as super fat."

"For combination or normal skin, add one-twentieth of super fat."

"You don't need to add super fat to oily skin."

"I have seen that most people have dry skin, so I added 550g of rice oil to cater to the needs of the general public."

“Then pour the lye into the rice oil.”

Sodium hydroxide reacts with carbon dioxide in the air to form sodium carbonate.

Sodium carbonate is poorly soluble in saturated sodium hydroxide solution.

So the lye solution looks a little cloudy.

"After dissolving the alkali, you need to cover it with plastic wrap."

"After the oil and alkali are mixed, you should start stirring constantly."

"If you want good saponification, you must stir it constantly."

"You can use this electric mixer."

The soap made by machine has a better degree of saponification than the soap made by hand. Jin Tiantian directly uses an electric stirring rod.

After stirring, the soap has become somewhat thick.

"When it reaches this thick consistency, pour in 100g of the weighed milk."

"You need to memorize these material numbers."

"If you can't remember it in your head, take notes."

Lan Ruanmei nodded. Although she had a good memory, she still took out the notebook given by Jin Tiantian and wrote down the numbers by copying the instructions with a pen.

"This milk not only makes the soap wash better, but also promotes saponification, so that even without keeping warm, the soap can be perfectly made."

"This solves the problem of soap making failure due to your inability to control temperature."

After all, there is no specific numerical temperature in this world, there are only words like hot, warm, cool, cold, and chilly.

“After adding the milk, you just keep stirring.”

Rice oil is a fast-acting oil and saponifies very quickly.

A novice can use it to practice and it only takes less than half an hour to complete it.

After stirring for a quarter of an hour, the soap liquid was already T.

T is the abbreviation of trace, which means trace.

When the scraper leaves an obvious, non-fading mark on the soap liquid, it is a trace and can be put into the mold.

"It's ready for the mold at this point, but I suggest you keep working on it for another quarter of an hour."

When the soap liquid reaches a thick T state, it is the best time to put it into the mold.

"The thicker the soap, the more complete the reaction, and the better the soap will be."

Jin Tiantian worked for another quarter of an hour and spent two hours with the scraper.

"This is the state that has lasted for another quarter of an hour. This state, which is thick enough to write on, is the best."

This level is called thick T.

"It's ready to be molded."

Jin Tiantian poured the soap liquid into the milk carton.

"After putting the soap into the mold, place it in a cool, dark place, and the soap will continue to saponify."

"You don't need to keep it warm. You can let the remaining soap in the basin saponify on its own for two days before washing. It's very easy to wash."

"You can remove the mold the next day."

"If there are small water droplets on the surface of the soap, just wipe them off."

Jin Tiantian and Lan Ruanmei completed another big project. Xie Yu secretly sighed that his sister seemed to be able to do everything.