What is the "bottom" of jadeite

In the traditional jade world, the "bottom" is also called "land" or "land". Among the many indicators for assessing jade quality in terms of color (color), texture (species), transparency (water), land (bottom), craft level (work), and weight, the most confusing but unavoidable concept It is the "bottom", because the jade is about the "bottom", and the jade is often talked about "bottom."

First, the meaning of the "bottom" of jade

The original color carrier is the "bottom", which is well understood, but for the understanding of the jade "bottom", we can not ignore two points: First, the evaluation of the value of jadeite is focused on the evaluation of the green (green); Second, the understanding of the "bottom" of jade must fully consider the long-standing business habits and folk valley language. For jadeite, the green carrier is the "bottom" and the sum of all substances except green is the "bottom". The "bottom" is a characteristic of the light green base part except green, which is a combination of jade texture (species), transparency (water), gloss, clarity and light tone.

“Bottom” is an intuitive feeling of the human eye on the appearance and interior of the jade jewelry, and it is also an index to comprehensively evaluate the quality of jadeite. It is more an ornamental and aesthetic comprehensive indicator, so the “bottom” "The evaluation of merits and demerits is not quantifiable. Whether the jade is colored or colorless, there is no green, no jade, the bottom is objective existence, that is, this "carrier" is objective. However, when there is no green, no color block, color pattern, or stain, in the quality evaluation, the influence of the "bottom" on the aesthetic effect of the jade jewelry can be ignored.

When observing and interpreting the "bottom", there are three points worthy of our attention:

1. Other colors than Cui (green) - background color.

2. When the jade is colorless, the “bottom” is a comprehensive expression of species, water, luster and clarity.

3. When the jade is full of green or full color (orange, yellow, black, etc.), the color is integrated with the base. At this time, the "bottom" is a comprehensive expression of species, water, color, luster and clarity.

Second, the evaluation of the "bottom" of jade

From the meaning of the "bottom" of jade, we can see that the connotation of "bottom" contains two key elements and three general factors. The two key elements are texture (species) and transparency (water). The three general factors are luster. The base color and the purity of the jade. Therefore, to evaluate the "bottom" and advantages and disadvantages of a jadeite finished product or semi-finished product, the main points should be focused on the following:

1. The effect of emerald and seed and water. This effect includes the effect of one complement or no complement or even mutual restraint between the three, and the luster characteristics of the appearance of the jade piece.

2. The part other than Cui and Cui, that is, the degree of coordination with the entire base.

3, the purity of the jade. The less sputum, white cotton, black spots, gray silk, ice slag, etc. of jade jade pieces, the better the "bottom" may be.

Based on the above three evaluation principles, the “bottom” is better in terms of solid texture, compact structure, high transparency, lustrous, primary color (green) and base, and the whole ornament and the beginning. The “bottom” clean and delicate jade jade material has a very smooth surface and is transparent and radiant under the illumination of light. It can fully reflect the charm and aura of jadeite jade pieces. The business people in the jade world call this phenomenon "poetry foot"; "plant" old, good color, water permeability, and less, can well set off the jade The nobleness, beauty and value of the ornaments give people the feeling of greenery, quietness, or the feeling of fire like tea. The jade business called this kind of "bottom", and this kind of feeling is "eye-catching." The pros and cons of the "bottom" are directly related to the processing quality and ornamental effect of jade jade, which affects the quality grade and commercial value of jade jade pieces. Correct understanding and evaluation of the "bottom" of jade jewelry has a meaning that cannot be ignored.

Because of the comprehensive manifestation of various indicators, the “bottom” of jadeite can only be qualitatively evaluated in the quality evaluation. It can only be used as a reference indicator in the indicators of jade quality classification.

3. The difference and relationship between "bottom" and "species" and "water"

In reality, even in some books, “species” and “bottom” are two concepts that are often confused. In the recently promulgated local standard of Yunnan Province, "Jadeite Jewelry Grading", the professional name of "species" is "texture". From the point of view of jewellery, "species" refers to the structure and structure of jadeite, its connotation is the size of the crystal size of jadeite minerals, the thickness and density of jadeite fiber structure: "bottom" is "species" and "water" The organic combination and comprehensive manifestation of "color"; observing and identifying the "species" of jadeite, focusing on the concrete, concrete and microscopic geometrical indicators of jadeite; understanding the "bottom" of jadeite, it emphasizes the comprehensive synthesis of relevant indicators A holistic, macroscopic, external feeling. Obviously, "bottom" and "species" are both related and different.

In some materials, it is not appropriate to confuse transparency (water) with “bottom”. Of course, among the names of many jadeite “bottoms”, some “bottoms” are named after the characteristics of transparency and transparency, but the meaning of “bottom” is far more than a transparency indicator, “bottom” and “water”. "Not a concept. This is also a problem that is easy to say clearly.

The difference between "species" and "bottom" is poor. For example, the "Tielongsheng" jadeite with a rough structure is not good, but it is not necessarily good for "planting" and "bottom", such as "ceramic bottom" jade, some The structure is very dense and delicate, but the “porcelain bottom” jadeite belongs to the middle and low grade jade. Only when "species" and "water" are good, can there be a good foundation; only the purity of "species", "water", color and jade will be good, and this will be a good foundation for many years. A summary made by Jade. As for why there is such a phenomenon, there are many mineralogy, physics, gemology and art appreciation, and we are constantly exploring.

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