In ancient times, saltpeter was a common refrigerant that could be used to make ice cubes. This article will introduce the production methods, techniques and precautions of the ancients who used saltpeter to make ice.
First, the production method.
Prepare materials: saltpeter, water, containers.
Grind saltpeter into a powder, the finer the better.
Add an appropriate amount of water and stir well until dissolved.
Pour the solution into a container and place in a cool, ventilated place.
Wait for a while until the solution solidifies into ice cubes.
2. Skills. Master the amount of saltpeter: The amount of saltpeter is the key to making ice cubes. In general, 100 grams of saltpeter can make about 500 grams of ice cubes. If you need to make more ice cubes, you can increase the amount of saltpeter proportionally.
Control the temperature: During the production process, the temperature of the solution should be controlled. If the temperature is too high, the solution will not solidify into ice cubes;If the temperature is too low, it will cause the ice cubes to be too hard and not conducive to use. Therefore, it is necessary to maintain a suitable temperature during the production process.
Stir well: When dissolving saltpeter, stir well to ensure that there is no precipitate in the solution. This helps to improve the quality and solidification of the ice.
Container selection: When making ice cubes, choose the appropriate container. In general, stainless steel or plastic containers are more suitable because they have good thermal insulation properties and cold resistance.
3. Precautions.
Safety first: Pay attention to safety when using saltpeter. Saltpeter is mildly toxic and may cause harm to the human body when exposed to it for a long time. Therefore, wear gloves and a mask when working with saltpeter, and minimize the time spent in contact with **.
Avoid accidental ingestion: saltpeter should not be eaten, and once ingested, seek medical attention immediately. When using saltpeter, avoid the contact of children to avoid accidental ingestion.
Do not mix: Do not mix saltpeter with other chemicals when using it to avoid toxic substances or reduce the refrigeration effect.
Storage: Saltpeter should be stored in a dry, cool place, away from direct sunlight and humid environments. It is best to grind saltpeter into a powder and dissolve it well before use to improve the refrigeration effect.