How to Check the Purity of Coffee Using Water
When evaluating the purity of coffee, one simple and effective method is to use water. By observing the behavior of coffee powder in water, you can determine whether it is pure or contains impurities.
Pure coffee powder is lightweight and fluffy. When dropped into cold water, it will gradually absorb the water and sink to the bottom. However, if the coffee is pure, it will float on the surface for 1-2 minutes before sinking.
To perform the test, pour 1-2 teaspoons of coffee powder into a glass of cold water. If the coffee floats on the water’s surface as described, it can be considered good coffee.
On the other hand, if the coffee powder quickly sinks to the bottom, it likely contains impurities. Coffee with more impurities will have a denser consistency, causing it to sink faster than pure coffee.
If you have multiple types of coffee available, comparing and testing them can make the evaluation process easier.
Note When Drinking Coffee
When brewing pure coffee, even when strong, the resulting liquid will have a dark brown color resembling the color of wings. The appearance of the coffee will also be diluted.
In contrast, coffee with impurities, even when diluted, will have a dark or dark black color. The appearance of the coffee will be sticky like glue.
Why Do Some People Use Battery Cores to Darken Coffee?
There are reports of coffee shop owners using battery cores to darken waste coffee, coffee grounds, and coffee bean shells. These materials are then processed and packaged as “high-quality” coffee powder for the market.
While it is known that battery cores are harmful to the metal components within them, some users wonder why unethical business owners choose to use battery cores, which are definitively harmful to the body, to darken coffee.
The reason behind this choice is that to darken coffee bean shells and other types of beans, an adhesive substance is required. The adhesive substance found in battery cores is the cheapest and most effective. Therefore, unscrupulous business owners opt to use it, disregarding the severe health effects on consumers.
Visually distinguishing between dirty, battery-dyed coffee and regular coffee is challenging, as all types of beans and batteries are crushed into powder, mixed with additives, and flavored. The resulting cup of coffee may still have a pleasant aroma and taste.
To ensure safety, it is recommended to purchase coffee brewed in traditional filters from reputable brands and consume coffee at reputable establishments to avoid accidentally consuming battery-dyed coffee.
Performing the simple test of evaluating coffee powder with water can help users identify battery-dyed coffee and ensure their safety. It is a beneficial practice worth trying.
For more information, refer to the source: 24h.com.vn
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