Have you seen this gourd-shaped light green glass bottle?
[China Glass Net] "It was broken when unearthed, gourd-shaped, the wall is extremely thin, the appearance is light green, the residual height is 3.2, and the larger diameter is 2.9 cm." The material of this utensil is the lead-bismuth glass produced in the domain.
First, the device slips shoulders, round belly, small flat bottom. Although the neck and mouth of the device have been broken, it is not difficult to predict the shape of the original from the remaining neck curve. This shape is not only present in a large number of objects of the same texture, but also in the contemporary gold and silverware. Far away, there is a small enamel gold bottle in the Leifeng Pagoda. Together with the relics in the Huiguang Tower and the gold bottles built in the gilt relics, it is a good writing style. . However, due to the influence of many factors such as the process of gold and silverware and glassware, there may be differences between the two in the nuances. For example, the above-mentioned gold and silver ware mouth is along the outer edge or the curling edge, and the mouth of the glass is often rounded by the burning mouth. . Of course, this is only a small difference, and its general shape is still similar. This shape is customarily called a gourd bottle, which is a traditional utensil shape in China, and it is almost invisible abroad.
Second, the device is severely weathered, with a large yellow weathered layer attached to the surface, small white spots, opaque (by: may be caused by serious weathering inside and outside the bottle), but the surface gloss is very good and can be reflective. We know that the ancient glass has poor chemical stability and is easily weathered by long-term erosion by humid air, rain water or ground water. In this respect, lead-bismuth glass is especially more than soda-lime glass. And the weathering layer formed by the weathering of the two is also different. The weathering layer of lead-bismuth glass is not easy to layer; while the weathering layer of soda-lime glass is layered, easy to peel off, and the weathered layer is crispy. With this in mind, it is easy to understand why this glass bottle has been in the damp environment of the underground palace (in the early years, it has been in the water) for thousands of years. Although the weathering is serious, the surface is still very smooth, because this glass bottle is lead bismuth. Glass, and high lead content (according to: China's traditional lead-bismuth glass was converted into high-lead glass in the Sui Dynasty), the weathered layer formed is closely attached to the surface of the bottle. For the understanding of the chemical nature of lead, our ancestors have long been familiar with the chest in the ceramic industry. Lead itself is not only a component of lead-bismuth glass, but also the lead oxide produced in the process of making glass increases the refractive index of the glass, which is characterized by its lustrous beauty and beauty of soda-lime glass. However, due to the poor chemical stability of lead, high-lead glass is not resistant to corrosion, so the excavated material is often dull and dull, with a thick yellow-white weathered layer on the surface, which is difficult to see the color of the year. The surface of the glass bottle unearthed in the Leifeng Pagoda is still shiny, reflective, and faintly visible in its former style. It is not easy to save to such a situation.
Third, the utensil is as thin as an eggshell, plain, and without ornamentation. One of the main features of domestic glassware is that the wall is thin, so it is thinner than eggshell or thin as paper. Due to the thinness of the wall, it is fragile, so most of the domestic glass products found have been broken, and few are intact. Plain surface, no ornamentation, this decorative feature is also the typical artistic style of domestic glass, which is quite different from the traditional craftsmanship of decoration in China, such as ceramics, gold and silverware, lacquerware and so on. The reason may be limited by the glass raw materials, properties, technology and so on.
Later, the shape of the device is small and the appearance is smooth. The compact shape can be said to be one of the important features of the ancient domestic glassware in the shape. The smooth appearance indicates that the bottle is blown freely without mold, because the inner and outer walls of the object form a free surface during the free-form blowing process. Dieless free blowing is a method of glass blowing process. It is more suitable for small objects. When it is introduced into China, this simple technology gradually replaces the traditional complicated casting method and makes the production of domestic glass. There has been a leap.
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