Ancient China Used THIS to Make Ice?!

Añadido: 2026-05-19

[00:00:00]If you dig a shovel of wood soil next to a dry toilet, put it in the storm water.

[00:00:03]Mason plant ash, crush it into powder.

[00:00:05]This is raw soil removal. And then you come in with your neighbor and you get a barrel. Cut holes in the bottom of the barrel. The barrel is covered with straw and fine sand as a filter layer. Then pour in the mixed nitrate soil. Then you drizzle hot water over the soil.

[00:00:18]After the hot water seeps into the soil, yellow liquid will leak from the bottom of the barrel, potassium nitrate solution. But the solution at this time cannot be used yet. You need to pour it into a pot and cook it over high heat.

[00:00:27]Stir it till all the thin layer of white facial appears on the bowl surface. Turn off the heat. Cover it with cotton cloth while it's hot and let it cool down.

[00:00:34]Then you [music] will find the nitrate will slowly absorb the white crystals.

[00:00:38]This is the key to making ice saltpeter.

[00:00:40]Then you get a water basin, one big and one small. Place the small basin of water in the center of the large basin.

[00:00:44]Then put the nitrate into the large basin. The water dissolved with saltpeter will absorb heat like crazy.

[00:00:49]Hold the water temperature below 0° C by heat transfer. The clear water in the small basin slowly condenses into ice.

[00:00:54]Then congratulations, completed ancient ice making. And here's the thing, you don't have to throw away the used nitrate water. Put it in the hot sun to dry the water. Saltpeter crystallizes, can [music] be recycled indefinitely. In the narrow without refrigerators, the ancients simply observe nature. The income from the soil turned into a summer [music] artifact that can cool down.