There are two main points in how to distinguish crystal and glass tableware:
One is to visually discern. First look at the presence or absence of the logo, usually the crystal products will be marked with 24%, that is, lead oxide composition; then under strong light to see whether there is a reflection of colorful light, crystal has colorless transparency and large refractive index, this is the general glass Products are not available.
The second is the sense of touch. If the visual inspection cannot be confirmed, the weight of the product can be picked up. Since the crystal contains lead oxide, the weight is heavier than that of the glass; if it is a cup, the nail can be clamped to the outside of the cup, as if it is crisp. Echo, it can be proved as a crystal product.
Glass tableware
The quality of ceramic tableware is not as delicate as that of other porcelains, but it also makes ceramics popular with many design craftsmen, and uses it to express the casual style or traditional cultural charm.
The main point of choice of ceramic tableware is to see if its utensils are out of shape, and then whether the painting process is fine. White porcelain is actually a porcelain that has not been decorated. Ceramic tableware does not rust, does not decay, does not absorb water, the surface is hard and smooth, easy to wash, has the advantage that other tableware is difficult to compare, but the lead in ceramic is also a problem that can not be avoided in the manufacturing process for thousands of years. Over the years, the relevant spot checks by the State Quality Supervision Department have also shown that excessive lead dissolution has become a common problem in ceramic tableware.
When purchasing ceramic tableware, you should pay attention to the choice of small or safe underglaze or glaze tableware. Do not choose tableware with very bright colors and colored decorations on the inside. For glazed porcelain, it is easy to identify by visual inspection and hand touch. Those who are not as bright as the glaze, the smoothness of the hand, or the convexity of the edges of the picture should be carefully purchased. In addition, consumers should not buy ceramics on the booth. Products, if economic conditions permit, you can also choose lead-free glazed green tableware that is 384 times more expensive than ordinary ceramic tableware. Before using the newly purchased ceramic tableware, you can soak it with vinegar to melt most of the lead. When using it, do not use colored ceramic tableware to hold acidic food.
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