2. Softening: minerals such as calcium, magnesium and iron in hard water will affect the dissolution of acidic substances in tea and affect the aroma and color of tea. Therefore, softened water is a better choice.
3. Low chlorine: Water with high chlorine content (Cl-) may destroy the chemical components in tea, affect the taste of tea, and produce peculiar smell and color.
4. Low heavy metals: heavy metals (such as lead and mercury). ) is potentially harmful to health, so water with low borate content should be chosen.
5. Suitable temperature: Different kinds of tea require different temperatures of water, so it is recommended to know the temperature requirements for making tea in advance.