First, the purchase of ceramic tea must choose the formal market, must not be cheap to buy no formal manufacturer of inferior products. State regulations, the ceramic tea set in 4% acetic acid immersion, lead dissolution of not more than 7 mg / l, cadmium dissolution of not more than 0.5 mg / l. At present, the regular manufacturers of products can meet this basic requirements.
Second, the purchase should pay attention to see the fineness of tea, hand touching the surface of tea, see the wall is smooth.
Third, sniff with the nose to see if there is smell.