Product appearance quality consumers can first check the product box or box documents marked on the product name and grade; second, the actual quality of the product can be observed with the naked eye. When buying try to choose the surface without obvious defects, the shape of the regular products. For plate and bowl products, you can stack several products of the same specification and size and observe the distance between them. If the distance is uneven, it indicates that the device is irregularly shaped and deformed. For individual products, you can judge the deformation by placing them flat or snapping them onto a glass plate and seeing if they are in line with the glass plate. For porcelain products, you can hold it in your hand and tap the edge of your mouth with your finger. If it makes a hissing sound, it means there's a crack inside.

Preliminary judgment of lead dissolution and cadmium dissolution. In-glaze and under-glaze color products can be purchased with confidence as they have little or almost no lead dissolution and cadmium dissolution. Glaze color products should be purchased according to different applications. To minimize the effects of lead dissolution and cadmium dissolution, the following methods can be used: For containers used to hold acidic foods, products with fewer decorative surface patterns should be selected whenever possible. When purchasing, attention should be paid to whether the color of the pattern is bright. If the color is not bright, the temperature at which the flowers are baked may not meet the requirements, and lead dissolution or cadmium dissolution tends to be high in these products. Please pay special attention to products where the pattern can be rubbed by hand, these products often have very high lead dissolution or/and cadmium dissolution. Uncomfortable products can be soaked in vinegar for several hours. If the color changes significantly, they should be discarded.

In addition, for products that may be used in microwave ovens, microwave ovens and dishwashers, they should be purchased labeled ? Suitable for microwaves, microwaves and dishwashers? of the product. For products with larger uses, such as catering, choose products with thicker edges and rounded reinforced edges, which are less likely to be damaged in use. It is recommended that you do not use products with cracked edges. Such products are of low strength and may break when holding food, causing injury to the human body. Due to the presence of cracks, they can hide dirt and grime during use and are not easy to clean, which may lead to the propagation of bacteria and affect human health. Products labeled as decorative should not be used to hold food, and their lead and cadmium dissolution is not controlled by standard limits.