In that instant, Hu Dahai's eyes lit up.

Yes, how could he not have thought of that! This discarded photo washing water is a real treasure.

These days, most people still take photos at photo studios.

Except for extremely wealthy families, ordinary families struggle to even buy a television, let alone a camera.

Therefore, some people only take three photos in their entire lives: one when they were children, one wedding photo, and one last photo when they die.

In those days, photographs were taken using film, which involved coating polyacetic acid sheets with silver halide and then turning the silver ions into black through light, creating black and white film.

To get the photos, you need to soak and rinse them with chemicals, which is called photo developing.

Almost every photo studio has a small, dark room, which is specifically used for developing photos.

The chemicals used to develop photos are actually developing solutions containing silver bromide. The principle is to reduce the silver ions in the photos, and then fix them with a fixing solution containing sodium thiosulfate.

Therefore, all of these photo developing solutions are rich in silver ions.

By collecting these washing solutions, concentrating and purifying them, and then replacing the silver ions in the washing solutions with other inexpensive metals such as aluminum, metallic silver can be obtained.

Hu Dahai wasn't sure if anyone was eyeing silver extraction from photographic washing water, a niche money-making project.

So he feigned curiosity and asked, "Boss lady, why don't you just throw away all this waste photo developing water? It's such a hassle to put it in a bucket like this."

The proprietress turned to look at where Hu Dahai was pointing and immediately sighed, "Oh, it's not that we don't want to dump it, it's that the government has explicitly ordered us not to dump this waste photo washing water into the river at will. Otherwise, they'll fine anyone who gets caught."

Hu Dahai breathed a slight sigh of relief upon hearing this. The proprietress hadn't mentioned that someone was coming to buy it, which meant that at least no one in Hangzhou had yet discovered the business opportunity here.

So he feigned sympathy and said, "It's not good for you to keep storing all this photo wash water."

“Who says otherwise!” the proprietress said indignantly. “I have to save it up for a while each time before taking it all to a designated place outside to dump it.”

"We've been so busy with business lately that we haven't had time to deliver, and this has all piled up."

As the proprietress spoke, she realized the topic had veered off course, so she said to Hu Dahai, "Comrade, your clothes are still wet. Why don't you come inside and I'll light a coal stove for you to warm up?"

However, Hu Dahai had no interest in discussing the clothes with the landlady.

He stood up abruptly and said to the proprietress, "Proprietress, you don't need to worry about my clothes. Clothes are nothing. I'm more interested in you!"

Upon hearing this, the proprietress immediately grabbed her chubby shoulders and took several steps back, saying cautiously to Hu Dahai, "You, you comrade, how could you do this! Although you are good-looking, you're too fast. I'll leave the door open for you tonight."

Hu Dahai: ? ? ?

Upon reflection, he realized that he had spoken carelessly in his excitement.

So he waved his hands repeatedly: "No, I misspoke just now."

"I'm more interested in your photo washing solutions."

"How about this? From now on, you won't have to go through the trouble of sending your camera washing water to a specialized treatment station outside. I'll just come and collect it."

"Ah?" the proprietress exclaimed in surprise, thinking to herself that there was such a good thing.

To her, these photo developing solutions were a huge burden. Every time she had to carry them out, they were heavy and cumbersome.

It's safe to say that the biggest headache for the owner of the photo studio is dealing with the photo developing solution.

I never imagined that by casually splashing a basin of water, I would also throw away this hot potato.

"Do you want money?" The proprietress thought for a few seconds and felt that there was no such thing as a free lunch in this world. What was the difference between this and a pie falling from the sky?

Therefore, she immediately suspected that Hu Dahai wanted to ask her for money through this.

Hu Dahai shook his head: "No need."

The proprietress was completely baffled. From her perspective, no matter how she thought about it, she couldn't understand what Hu Dahai was doing all this for.

She wasn't his son or daughter, so why did he treat her like this?

Could it be that someone has taken a liking to me? Is they trying to use this opportunity to get closer to me?

The proprietress remembered what Hu Dahai had said earlier—that he was quite interested in her.

Her chubby face immediately turned red.

She glanced somewhat shyly at the mirror hanging beside her, feeling that her outfit today was indeed exquisite and charming.

Even her double chin is so cute and alluring.

Hu Dahai immediately noticed the proprietress's unusual behavior. From her delicate demeanor, Hu Dahai thought to himself, "I'm doomed. She must be overthinking things."

So he quickly explained, "Boss lady, don't think I'm making a losing deal. Actually, this photo washing solution is useless to you, but it's still somewhat useful to me."

“I know a method that can recycle some of this washing water through a series of complex processes, which is why I asked you for it.”

After hearing Hu Dahai's explanation, the proprietress's face clearly showed some disappointment.

So it turns out that people wanted these photo washing solutions not because they liked me, but because they could reuse waste.

Even so, the proprietress felt she had made a profit, since she wouldn't have to figure out how to deal with the troublesome photo washing solution anymore.

She agreed without hesitation, saying, "Okay, then I'll collect all my photo developing fluid for you from now on, you can just come and get it."

After receiving the landlady's approval, Hu Dahai did not rush to leave.

Because the photo washing solution from just this one store is simply not enough for him to use; he needs more photo washing solution.

So he asked, "Madam, you seem like a very kind person, and you must have many friends. Do you have any friends who also run a photo studio? Could you introduce me to someone whose developing solution I can use? Would that be alright?"

When the proprietress heard someone praise her for being kind and having many friends, her eyebrows subtly lifted.

She immediately patted her chest and said, "You've come to the right person! I'll contact someone for you tonight, and I'll make sure everything is arranged in advance when you come tomorrow!"

Since they've praised me like that, even if I don't know them, I'll still go and get to know a few later.

Hu Dahai left happily.

The next morning, after selling the fish, he put several large buckets on a cart, pushed the cart, and called Guan Asan to go to Hangzhou again.

It had been a long time since Guan Asan had pushed the cart to the city with Hu Dahai.

It was a rare opportunity for him to return to his old profession, so he tried his best to perform, pulling the cart with all his might.

Even if nothing else, just considering the 100 yuan bonus Hu Dahai gave him during the Spring Festival, he couldn't let Hu Dahai down.

When they arrived at the entrance of the proprietress's photo studio, she kindly prepared hot tea for them.

"Comrade, when you go along the road, I've already spoken to these photo studios. Just say that I sent you there, and they will definitely give you the developing solution!"

The proprietress handed Hu Dahai a piece of paper with the names of several photo studios written on it.

In just one day, Hu Dahai collected a whole truckload of waste photo washing water.

on the way back.

Guan A-San looked at the heavy and dirty photo washing water several times.

Scratching his head, he couldn't understand why Hu Dahai wanted all that water.

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