White-glazed porcelain is, it, by the time of the Sui Dynasty, it had already matured. In the Tang Dynasty, white glazed porcelain had a new development, and the whiteness of porcelain also reached more than 70%, close to the standard of modern high-grade fine porcelain, which laid a solid foundation for underglaze and overglaze porcelain.
In the Song Dynasty, porcelain craftsmen made new improvements in terms of tire quality, glaze and production technology, and the porcelain firing technology reached a full maturity. The blue and white glazed porcelain fired at this time is white but not shiny, shining gray in white, light and elegant, and beautiful in shape. During the Ming and Qing dynasties, Dehua kiln fired "ivory white" with a bright color, and Yongle kiln fired "sweet white glaze" with a glaze as warm as jade, which are all fine products in white-glazed porcelain.
If porcelain is not properly maintained, it will be seriously harmed, which is not conducive to the long-term collection of porcelain, especially the fine products that have been handed down and unearthed, and should be carefully maintained. The maintenance of porcelain must follow the principle of care, care, and at the same time, the maintenance of porcelain should not be too excessive to avoid protective damage. Here's how to take care of porcelain.
First, porcelain is fragile products, in the preservation should pay attention to shock, anti-extrusion, anti-collision. When appreciating the collection, be careful not to collide or fall, and try not to sweat and touch it. It is best to wear gloves when viewing the collection, the table is cushioned with flannel, do not pass it to each other when viewing, one person should be reset on the table at the end of viewing, and the others will hold it for viewing.
Second, bottles, jars, Zun and other porcelain are generally spliced from bottom to top, and the upper neck of the object cannot be carried by hand when moving. The correct way is to hold the neck with one hand and the bottom with the other. Some bottles, jars, and statues are decorated with both ears, and only the ears cannot be lifted when taking and placing them to avoid breaking or damage. Thin tire utensils, thin tires, light weight, squeamish, more careful when moving, placement, to hold the bottom with both hands, avoid using one hand, especially bottles, the bottom foot is small, the body size is longer, and it needs to be blown down by the wind.
Third, just bought back high-temperature glaze or underglaze porcelain, should first be soaked in clean water for l hours, and then wash off the oil stain on the surface with dish soap, dry the water with a towel and then put it in the box, the box should be filled with foam, and the diameter after adding foam should not exceed 0.5 cm of the collection, the collection should be loose and appropriate in the box, and at the same time should avoid squeezing to prevent damage to the collection.
4. Unearthed low-temperature glaze and glaze color. A lot of debris will penetrate into the glaze, and even the phenomenon of deglazing and color loss, a small amount of adhesive should be added between the glaze, and then a softer adhesive should be applied to the color to prevent the glaze from falling off in a large area. If it is buried underground for a long time in the high-temperature glaze or underglaze color, a lot of calcium and siliceous compounds are also produced on the surface of the porcelain, that is, rust. It can be cleaned once with clean water, soaked in 3% hydrogen peroxide for about 3 hours, and then soaked in water for more than 30 hours, and cleaned with a clean white cloth, which can generally remove rust. If it is not exhaustive, you can use a brush to apply acetic acid, brush on the rust, and after 5 hours, use a medical scalpel to remove the rust, and the blade can only be cut in one direction. After most of the rust is removed, it is washed with a white cleaning cloth and toothpaste until the rust is completely removed, this method is only suitable for high-temperature glaze and underglaze color.
5. When washing oil stains and other fouling, the following skills and methods should be mastered:
1 General stains can be cleaned with alkaline water, can also be cleaned with soap, washing powder, and then rinsed with clean water.
2. Wash thin tire porcelain in winter, and control the water temperature to prevent the alternation of hot and cold water from bursting the porcelain.
3 color porcelain, some due to the color of the more lead components, the phenomenon of lead, can be first used with a cotton swab dipped in white vinegar scrub, and then washed with water.
4 If the porcelain has open pieces or punch cracks, the stain is easy to "dip" into it, you can use a toothbrush dipped in some acidic liquid to brush. However, this method cannot be used for glaze utensils, because acids and alkaline substances are easy to damage the glaze. If it is gold-painted porcelain, do not use a feather duster for cleaning, because the feather duster can easily damage the gold tracing on the porcelain. Precious porcelain should be stored with wooden boxes or boxes of corresponding size and galls in order to preserve the collection.
