First of all, we have to start with the raw materials of bone china advertising cups
Bone china uses animal bone charcoal, clay, feldspar and quartz as the basic raw materials. The most commonly used are the bones of cattle, sheep, pigs and other animals. The British believe that 2-4-year-old calf bone is the best bone china. Although sheep bone has good plasticity and is easy to form, its whiteness is not as good as cow bone. Beef bone is the best raw material, followed by sheep bone and pork bone. Difference.
With good raw materials, good craftsmanship is even more needed, otherwise it will be ruined.
When the bone powder content reaches a certain proportion, the quality of the porcelain will be greatly improved, which is mainly reflected in the gloss and luster of the utensils. However, if the content exceeds a certain proportion, the composition of clay will be relatively reduced, the porcelain will become too soft, and it will be easier to crack during the production process. Higher technology is required in forming, which increases the difficulty of firing. more precious.
1. The formed bone china is sintered at a high temperature of 1250°C. During the sintering process, due to the very large shrinkage rate of the bone china, the finished product will shrink by 20% after kiln firing (generally, porcelain shrinks by 7%), so the shape is easily deformed. Bowls, etc., must be placed on top of the special Kuang bowls to cook for a long time.
2. After that, check the shape, bending and size. After grinding the surface, spray the glaze with a sprayer, and enter the kiln for glaze firing at 1150 °C.
The general coloring method is to paste transfer paper on the white finished product and bake it at 800°C. Manual coloring is time-consuming, but the texture of the picture is more flexible.
Health and Environmental Protection
Bone china advertising cups not only have a gorgeous and delicate appearance, but also are healthier and more environmentally friendly.
Ordinary porcelain products will be corroded by acid and alkali in daily use, and trace metals will overflow, which will affect human health over time. The bone china does not contain lead and cadmium. The in-glaze color and under-glaze color bone china is not only free of lead and cadmium overflow, but also the flower surface is not easy to wear and fall off. It is suitable for dishwashers, disinfection cabinets, and steamers. It is well-deserved. Green and healthy ceramics.