Chinese red furnishings porcelain local standards introduced

Let the "China" have the most beautiful red - "Chinese Red Furnishing Porcelain" local standards introduced This is a complex to the "demanding" process: First, the prime burn, two, glaze, three, braised, four, gold burning. Every link can not be biased, often more than a dozen pieces of large-scale porcelain can burn a finished product. It was exactly this so-called "red pottery of 10 kilns failing" that was quietly "born" in Changsha in the 1990s, making the world ceramics industry ecstatic. This large red porcelain also had an atmospheric name - "Chinese Red."

Today, more than a decade later, the price of a red peony Chinese red ceramic vase online is only 35 yuan. Without uniform quality standards, production companies have no standards to follow, and regulatory agencies have no standards to follow, resulting in uneven quality of Chinese red porcelain on the market, and flooded with shoddy products, which hurts consumers' love for Chinese red porcelain. Love is not conducive to the healthy development of China's red porcelain industry.

Today, this problem is expected to improve with the release of local standards for “Chinese red furnishings in Hunan”.

The Rise of the Rookie: "Chinese Red" is popular in China. It is China's national device. The original meaning of English is ceramic. However, for thousands of years, many colorful porcelains alone did not symbolize auspicious and festive, elegant and elegant red porcelain. This is because the chromophore of the red porcelain glaze is made of selenium-cadmium red, which is not tolerant to high temperatures. Decomposition starts above 650°C, and firing is extremely difficult. This has also become the age-old problem in the world ceramics industry.

After more than 20 years of hard work, experts from the Hunan porcelain industry have tackled thousands of difficulties, allowing the selenium-cadmium red material coated with zirconium silicate to withstand the high temperature of 1200°C. Finally, ceramic red enamel was applied to the white porcelain blank. The craft method is made of high-temperature firing to create a red porcelain with bright colors, noble and gorgeous, festive and auspicious, uniform light color and similar to the national flag color.

This major breakthrough in the history of Chinese ceramics has brought vitality to the ancient ceramic industry. Since the first batch of Chinese red chinawares entered the domestic market from Changsha, their vitality has rapidly emerged. The industrial scale has expanded from several hundred thousand yuan in 1998 to 300 million yuan in 2009. The variety covers ornamental porcelain and daily use. Porcelain and architectural porcelain, manufacturers only have more than 30 in Hunan Province, Shandong Zibo, Jiangxi Jingdezhen, Fujian Dehua, Foshan, Guangdong and Chaozhou and other places have production, sales markets throughout the country, and a small amount of exports.

Corporate crisis: The overall reputation of the industry is declining. However, at the same time as the rapid development of the industry, there is a lack of unified standards and industry management, and irrational and discordant situations in the industry have occurred from time to time.

Currently, the production technology level of China's red porcelain products sold on the market is uneven, most companies lack independent research and development capabilities, and enterprises plagiarize each other, low-level repeat production, shoddy, and low-cost disorderly competition. Manufacturers and merchants are all claiming to be Their own products are the best, and there are often incidents of mutual slander. Consumers have no power to discern **, and the overall reputation of the industry is declining.

Industry Guidance: The introduction of “Chinese red-furnished porcelain” local standards In order to promote the healthy and rapid development of China's red porcelain industry, since November 2008, the Hunan Provincial Bureau of Quality Supervision has organized and organized the Provincial Product Quality Supervision and Inspection Institute and other organizations to prepare "China Red Furnishing Porcelain" local standards. The group has visited more than 20 Chinese red porcelain production enterprises in the province, collected relevant technical requirements, mastered the production process, conducted analysis and experiments on more than 20 products provided by the company, and focused on all technical parameters in the standard. For the verification, he fully listened to the opinions of the ceramic experts and technicians inside and outside the province. After several revisions, he finally issued the local standard of “Chinese red furnishings”.

On the morning of August 18th, the Quality Supervision Bureau of Hunan Province held a press conference on local standards for "China Red-steering Porcelain". The standard focuses on specific provisions for porcelain, glaze color, thermal stability, water absorption, radionuclide limits, appearance defects, and dissolution of lead and cadmium. According to this standard, it is entirely possible to solve the problem that it is difficult for Chinese red furnishings to appear on the market to carry out conformity determination and product classification.

Liu Liwei, deputy governor of the People's Government of Hunan Province, pointed out at a press conference that the Provincial Bureau of Quality Supervision organized the development of local standards for “Chinese red-liquored porcelain”. It was the height of the history of the Chinese nation and served as a rejuvenation and development for traditional industries. One of the significant tasks of the expansion is another result of the Bureau’s implementation of the scientific concept of development, the service of the economic society, the promotion of the healthy development of the Hunan red porcelain industry, and the protection of the rights and interests of consumers.

The director of the Hunan Provincial Bureau of Quality and Technical Supervision and party leader Jiang Xinjian demanded that the quality supervision departments at all levels should organize red porcelain production enterprises, distribution units, and relevant departments to seriously study the provisions of the standard and accurately grasp the connotation and essence of the standard. All production enterprises must stand at the height of promoting the healthy development of the red porcelain industry and enterprises, earnestly promote standards, strictly enforce standards and ensure the quality of red porcelain.

Standard interpretation: Consumers can choose according to personal preference Jiang Xu, one of the drafters introduced, the glaze color value has a standard range, consumers can choose according to personal preferences in this range. The products with better materials and higher technological levels have a firing temperature of 1150°C to 1200°C or higher. The products have low water absorption, good thermal stability, less dissolution of harmful substances, and good glossiness. High-quality products are glazed, smooth, moist, with few defects or no obvious defects.

Industry insiders pointed out that the introduction of the standard provided good technical services and technical support for the Hunan Red Porcelain Enterprises, which will help support the red ceramic enterprises to regulate production, become bigger and stronger, and can continuously increase the gold content and popularity of red porcelain, highlighting China The scarcity and preciousness of red porcelain has led Hunan Ceramics to move toward the country and the world.

In addition, according to the reporter, Hunan Provincial Quality Supervision and Inspection Institute for Goods Production is working on the preparation of local standards for "Chinese red daily-use porcelain" and is expected to be promulgated and implemented by the end of the year.

【tips】

Introduction of China Red Porcelain Industry Technology Development At the end of the 1990s, the first batch of Chinese red porcelain went from Changsha to the domestic market. Since then, the scale of the industry has expanded rapidly, the sales market has spread throughout the country, and there has been a small amount of exports.

The key to the production of Chinese red porcelain lies in the preparation of red glazes. After more than ten years of development, red glaze technology has experienced the development process from the first generation, the second generation to the third generation. The chromophores of Chinese red porcelain glazes are currently used as cadmium selenide red pigments, referred to as selenium cadmium red, which can be divided into non-wrapped pigments and coated colorants. The advantage of selenium-cadmium red is that the hair color is pure. The disadvantage is that it is not resistant to high temperatures, and it begins to decompose above 650°C. The selenium-cadmium red material after being coated with zirconium silicate can withstand high temperatures above 1200°C.

The first-generation red glaze (or low-temperature red glaze) is a non-wrapped pigment blended with a low-melting base glaze and fired rapidly in a tunnel kiln at 700°C to 780°C. The product has good hair color, smooth glaze and is suitable for mass production of small devices. Disadvantages are the large amount of lead and cadmium melted out, and the secondary processing of the glaze (baked gold and roasted flowers) is limited because the glaze temperature is lower than 800°C. It can only bake glass gold, and the combination of roasted flowers and glaze is not firm enough. Shedding is not suitable for making high-end products.
The second-generation red glaze (or medium-tempered slow decomposing glaze) also uses non-wrapping pigments, together with a small amount of rare earth elements such as niobium and tantalum as negative catalysts to slow down the pyrolysis of selenium and cadmium, and the firing temperature is about 1050°C. Better, glazed secondary baking, baking can be completed at 800 °C without restrictions. The disadvantages are also obvious. First, in order to protect the negative catalyst, the composition of the base glaze is limited, resulting in poor flowability of the glaze during the firing temperature range, uneven glaze, and easy to produce orange peel glaze; The decomposition of the colorant does not stop at the calcining temperature, especially after the oxidation decomposition of the colorant* precipitates as a gaseous oxide, resulting in pores, and due to poor flow of the glaze can not be closed in time, resulting in a "pinhole" in the glaze. . The above defects make the glaze quality of the second-generation glaze unfavorable. At the same time, the second-generation glaze products must be fired in a special furnace, and the utilization rate of the kiln location is low, which is not suitable for mass production.
The third-generation high-temperature packaged glaze is coated with a high temperature base glaze, and the firing temperature is up to 1200°C. The hair color is good, the glaze is smooth and smooth, the glazed baking, the roasted gold are not limited, and firing is available now. Universal industrial furnace. The stability of the pad is improved after the colorant is wrapped. Another outstanding advantage is that it does not react with other colorants at high temperatures. Based on this advantage, Changsha Jindong Company has developed the technology of Dahong Glaze in the color, and the products have been put on the market. This technology has been applied for national patent.
China's red porcelain industry is a rookie of the ceramic industry, which has brought vitality to the ancient ceramic industry. At the same time, it lacks uniform standards and industry management, and the overall industry reputation is declining. In the long run, superior technology companies cannot grow, inferior products cannot be eliminated, and they will have catastrophic consequences for China's red porcelain industry. Therefore, it is imperative to formulate corresponding standards, regulate production and markets, and protect the healthy development of the industry.

[Tips]

How to Buy Chinese Red Porcelain Consumers should pay attention to the following aspects when buying Chinese red furnishings:

1. Whether the shape of the watch is Zhou Zheng, there is no distortion.

2. To see if the glaze is bright and clean, the chroma is the same, do not have sand bags, bubbles, deglaze and other defects.

3. To see if the appearance of defects, such as cracking, spots, lack of glaze, uneven coloring.

4. See if the drawing skills are fine, neat, and vivid.

5. See if the porcelain is clean and if there are other noises.

6. Listen to the sound of tapping is crisp and sweet.

7. See if the porcelain is hard enough, use a metal tool to see if there are traces.

8. Test the heat transfer rate, good porcelain is relatively heavy, high density, and slow heat conduction.