Jadeite rough stone cutting method and specific steps

There is an old saying: "If jade is not carved, it will not become a useful object." From raw materials to finished products, jade processing requires a series of processes. Regarding this aspect, the Chinese have unique craftsmanship and operational experience. They can make full use of the raw materials and try their best to bring out the characteristics of the raw materials, so as to achieve the most perfect artistic effect on the basis of saving materials. Today, the editor will give you some basic knowledge about the cutting method and specific steps of jadeite raw stone. The cutting methods of jade may vary in different regions, but they are generally the same.

What are the cutting methods and specific steps for jadeite raw stone? In general, the following steps will be taken:

1. Raw material analysis - material inspection

Before processing, you must have a comprehensive understanding of the actual situation of the raw materials, that is, understand the specific conditions of the processing object. This is just like a doctor treating a patient. Only through analysis can we prescribe the right medicine and treat the patient accordingly.

Lighting is used to analyze the internal situation of the jadeite raw stone. This is an important reference for experts before making a bid. As for this stone, the colored areas are very obvious and the color situation is also clear, which belongs to the category of not difficult.

2. Stone slicing: refers to the first cut to split the stone.

How you cut is the key. If you don’t cut it well, it is entirely possible that one million will turn into one hundred thousand! After careful observation and judgment, you need to choose the direction for cutting. If there is a crack, the first cut is mainly along the grain.

The largest stone:

1. Original method: burning - to explode into small pieces. Disadvantages: it is difficult to control the explosion point and the damage is serious.

Later it was improved to partial burning.

2. Wire drawing (wire saw): Use iron wire and silicon carbide (SiC) as abrasives, add water to cool, and pull back and forth to loosen the jade. Advantages: No damage to quality and no waste of raw materials. Disadvantages: Slow.

3. Pedal feeder

It has been used since the Qing Dynasty and has now been replaced by electric ones. But it is still used for high-quality jade or in mountainous areas without electricity. A round iron-thallium-copper disk, a rotating shaft, a belt or tape, and a foot pedal to drive the rotating shaft, continuously adding corundum to slowly cut the jade.

3. Slice and prepare the ingredients.

After the first cut, the color, crack distribution, water head, etc. of the jade material can be more clearly understood, and preparation for slicing can begin.

Principles of cutting:

(1) Be especially careful with pigments, making sure not to destroy the green color.

If the materials are cut well, used well, and shipped well, greater profits can be obtained, so experience is very important for the cutting master.

(2) Start cutting from the worst part.

Before you gain experience, it is better to start with the worst part so that you won’t lose too much.

(3) Make the finished product as large as possible

The larger and rarer the finished product, the higher its value. If you can make bracelets, make them first and use the rest to make small accessories. Those with many cracks can only be made into flower pieces or withered pieces.

(4) The principle of dual use

Flower pieces and bare bodies go hand in hand. If possible, make them bare bodies as much as possible, and don't be too strict.

fcgc66

fcpf18