He filtered it several times and breathed a sigh of relief: "Now we just have to wait for it to cool down completely."
During the cooling process, saltpeter will crystallize out, which is the purified saltpeter.
While waiting, Chi Yan repeatedly stole glances at Shen Tangning.
He was also a little uneasy, wondering if his unusual behavior might arouse her suspicion.
However, Shen Tangning was engrossed in reading a book and showed no intention of paying him any attention, so Chi Yan gradually relaxed.
"Son-in-law, is it all better now?"
Xue Qing entered the room with a slightly excited expression, carrying a basin in both hands. Chi Yan stood up, took a few steps forward, picked up a handful of white crystals, which still retained the warmth of the sun's baking. He nodded slightly: "It's ready."
Shen Tangning also glanced at it: "It looks much clearer than before."
"So, are we going to make ice next?"
Everyone in the room stared at him expectantly. Chi Yan sighed and said, "Go fetch a basin of cold water, and also get a larger basin and a wooden bucket."
Ba Liang said "Hey!" and hurriedly ran towards the kitchen. Xue Qing was afraid that he couldn't carry it all by himself, so she followed him.
After the two returned with their items, Chi Yan placed the basin filled with water into the large basin, then added saltpeter into the large basin, added more water, and finally covered both basins tightly with a wooden bucket.
Having made all the necessary preparations, he awaited the outcome.
"Is that all?" Shen Tangning raised an eyebrow, finding it quite interesting.
"It should be okay now." Chi Yan couldn't help but feel uneasy, after all, it was his first time trying to make ice with saltpeter, and he didn't know if anything went wrong.
With so many people watching, if we fail, we'll lose face big time!
Saltpeter absorbs heat as it dissolves in water, which is the principle behind ice making.
The wooden barrel was opaque, so they couldn't see what was inside. Chi Yan cleared his throat and said, "Why don't we do something else first? It's boring to just wait here."
Xueqing blinked: "This servant doesn't find it boring at all, it's quite interesting!"
Ba Liang nodded in agreement: "Isn't that right? It's so rare to see water freeze into ice with your own eyes!"
Chi Yan: "..."
Shen Tangning subtly curled the corners of her lips: "Alright, aren't you all tired of squatting here? It takes time for the ice to freeze, so let's do something else for a while."
Chi Yan suddenly felt that there was no one more considerate than Shen Tangning!
She gave the order, and Xueqing and Ba Liang had to obey.
Once everyone was out of sight, Chi Yan felt as if he had been granted a pardon. He anxiously circled the wooden tub, clasped his hands together against his forehead, and muttered, "Heavens above, please let it succeed! My reputation for life depends on this!"
Shen Tangning, standing at the door, listened to his rambling and shook her head with amusement.
How can one restore a lifetime of good reputation?
Does he have some misunderstanding about himself?
Another half hour passed, and Chi Yan, suppressing his anxiety, carefully lifted the wooden bucket.
Steam rose from the wooden basin, where the water had frozen solid. He tapped it with his fingers, producing a crisp sound.
He was overjoyed; it was a success!
Chi Yan swaggered over to Shen Tangning, carrying a full basin of ice, and casually raised his chin, saying, "See, I told you, it's nothing."
She couldn't help but smile, and said from the bottom of her heart, "My husband is amazing!"
Seeing that Chi Yan's ears had turned slightly red, she couldn't help but think to herself.
This person is actually quite cute.
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