After buying new utensils, first disinfect the porcelain ones by boiling them in boiling water for 5 minutes. Then, soak them in room temperature vinegar for 1-2 hours. Vinegar can produce hydrogen ions (in small amounts) to replace the toxic substances produced by ceramics when exposed to acid. When discoloration is observed, it means the item cannot be used.
When using ceramic furniture as intended, it should not be used to hold acidic, alkaline, or oily food for long periods. Do not put the entire vessel in the microwave, and melamine tableware should also not be used in the microwave. Only ceramic products specifically designed for microwave use should be placed in the microwave. For cleaning, generally washing with a soft cloth, warm water, and an appropriate amount of dish detergent is sufficient.