Speaking of laundry detergent, one cannot help but mention soap.
Back when supply chests still yielded items, Lan Qingyou had acquired some other toiletries besides soap.
For instance, things like shampoo, toothpaste, and toothbrushes.
But as time passed, these toiletries had basically been used up.
So, Lan Qingyou decided to try making them, starting with the simplest one: soap.
After all, it was truly simple to make.
Even on Blue Star, which lacked mana, anyone could make handmade soap as long as they had enough materials and followed a specific ratio.
In fact, Professor Seymer, the one who taught Lan Qingyou chemistry, had established himself in their shelter and become one of its leaders by making exactly that.
Lan Qingyou: “Professor Seymer, I have a few points I don't understand regarding laundry detergent.”
Seymer Gil: “First of all, my surname isn't ‘Sai.’ Please call me Professor Seymer. Secondly, I am still researching laundry detergent. After all, these materials all contain mana, and I have to find a way to fuse the mana of these ingredients together.”
Lan Qingyou: “I see. So, Professor Seymer, can anionic surfactants and non-ionic surfactants be directly replaced with mana?”
Seymer Gil: “Replacement should be feasible, but personally, I believe that rather than a total replacement, a small amount of mixing is necessary. Also, my surname is not Sai.”
Lan Qingyou: “Right. Actually, I was thinking the same thing. After all, alchemy requires equivalent exchange.”
Seymer Gil: “Very well. Then today, let’s talk about some knowledge points regarding surfactants as a whole.”
...
Guys, you have no idea!
Lan Qingyou, who originally just wanted to ask a few questions and then try making laundry detergent or liquid, was directly dragged into a chemistry lecture by Seymer Gil.
It was the kind of hell where you go to a teacher to clear up a doubt, only for the teacher to keep you after class for one-on-one tutoring.
Today wasn't even a class day.
Rather, according to the agreement, the three days of the mana tide were supposed to be a holiday with no classes!
Thus, for the entire afternoon, Lan Qingyou was force-fed almost every knowledge point regarding laundry detergent and liquid by Seymer Gil.
To prevent Lan Qingyou—that person who couldn't even address him properly—from getting distracted, the cunning Seymer Gil would even pose questions from time to time for her to answer.
It had to be said that perhaps Lan Qingyou truly had a talent for this, or maybe Professor Seymer was just a good teacher, or perhaps her own knowledge of alchemy was playing a part.
Lan Qingyou was able to absorb everything Seymer Gil taught very smoothly.
This caused Professor Seymer—who originally only wanted to obtain some alchemy knowledge from this witch to secure his footing in this otherworldly land—to develop a genuine appreciation for her talent.
Therefore, he spared no effort in teaching Lan Qingyou.
And on Lan Qingyou’s side, once she realized the man actually had real knowledge to teach, she reciprocated with something good.
That was the construction of alchemy circles.
Professor Seymer even consulted Lan Qingyou from time to time about alchemy circles.
After all, back in Seymer Gil’s hometown, this kind of occultism had once been very popular.
In symbology especially, many physics and chemistry bigwigs had conducted long-term research.
So, whenever Seymer Gil proposed a concept, Lan Qingyou would conduct an experiment on the spot and provide feedback on its feasibility.
With this afternoon of force-fed education, Lan Qingyou successfully produced laundry detergent by evening.
She even used flowers and plants with a scent similar to lavender as a fragrance source to ensure a pleasant smell.
However, this laundry ‘powder’ was a sludge-like substance somewhere between a powder and a liquid.
After giving Seymer Gil a sample as a homework submission and research material, she immediately brought out all the clothes she had accumulated over the past month.
The mana-powered drum washing machine wasn't large; it was a standard household model. It took Lan Qingyou two hours and two separate loads to finish washing all the clothes.
After purchasing a iron drying rack sprayed with matte black material from Chariot, she hung the clothes to dry on the third floor and went to sleep.
While she was resting...
Seymer Gil felt quite conflicted after receiving the laundry detergent sample from Lan Qingyou.
It made sense.
After researching for days, he couldn't compare to someone who made it after half a day of crash-course learning. As a teacher, while he was gratified, he also felt a bit of loneliness.
The next day, as soon as Lan Qingyou woke up, she saw a message from Chariot.
Chariot: “The item you wanted is finished. Take a look and let me know if there’s anything that needs improvement or adaptation.”
Lan Qingyou looked and saw it was the engine she had wanted earlier.
However, what Chariot had sent was a mana thruster.
Since Lan Qingyou had previously said she wanted some propulsion power, Chariot had made it in the form of a thruster rather than a pure engine.
She took it out and examined it closely.
The entire engine’s appearance and size were similar to a pair of binoculars, with two exhaust ports.
Because heavy metals were used, it was quite heavy despite its compact and delicate appearance, weighing about twenty pounds.
But for Lan Qingyou, who had the Lighten talent, this was nothing.
The Tower: “Could you add an adjustable snap-on hook on the top? Also, design something to control the gears. It should be about a meter long so it's easy for me to operate.”
Chariot: “Can do. That’s simple. I’ll go dismantle some parts. Wait a moment.”
After Lan Qingyou sent the sample back to Chariot, Chariot replied and left.
About half an hour later, Lan Qingyou, having finished washing up, received a new prototype from Chariot.
This time, the prototype had a drum-like disk added on top of the original twin cylinders.
On the disk, there was a telescopic slot and a rod-like object that looked like a motorcycle handlebar. It had three gear settings and a telescopic slot as well.
Chariot: “I added an adjustable slot this time, along with a roll-style gear regulator that can be pulled out up to two meters.”
Chariot: “The gears adjust automatically. Gear 1 saves the most mana but has low output. Gear 3 consumes the most mana but has the maximum output.”
Chariot: “Additionally, the output mana has been converted into gentle wind elements using mana conversion. I don’t know exactly what you’re using this for, but it shouldn’t hurt you when it starts up.”
Chariot explained the modifications.
The reason he could modify it so quickly was likely because he already had the components, perhaps from the tractor he made for the Empress or parts from his own ‘Doomsday Chariot.’
Lan Qingyou thought as she looked at the prototype.
The Tower: “Thanks. I’ll go try it out and give you a photo and a response in a bit.”
Chariot: “Sure.”
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