2, the core meat is not thick, the core skin is not thin, and the meat is thick and thin.
3, high density, if it is a low density core, it is easy to spend after oiling.
4. Is it a strange nucleus? If the nucleus is particularly large or small, its value will be high. It's even harder if it's a bergamot nucleus or a multi-flowered nucleus.
5. Look at the symmetry of color. In the process of hand-carved nuclear carving, due to the uneven surface of the nuclear carving, the convex part will often be rubbed, while the concave part is difficult or not at all. In this case, the color change of the nuclear carving will be inconsistent and uneven, and the color of the protruding part that changes color first will be slightly darker or significantly darker than that of the recessed part.
However, most players often brush some olive oil on the surface of the nuclear carving in order to clean it up. This sunken part will slowly change color after painting, but this color change has an obvious feature, that is, it is not bright enough. And the protruding parts that are often grasped by hand, together with olive oil, will become particularly bright.
6. Look for tiny scratches on the surface. Usually, we don't pay attention to the cleanliness of our hands. When our hands were dirty, we were scraping the nuclear carving with a piece of fine sandpaper. The longer the plate, the more small scratches there will be. Some friends pay great attention to this and wash their hands before serving. This is worth advocating first, and it also shows that they are playing very hard and very hard. But in spite of this, there will still be places that are ignored.
Many friends who play nuclear carving have their own small toothbrushes for cleaning nuclear carving. Every day when they are free, they will use a small toothbrush to brush some oil on the nuclear carving. The nuclear carving is clean, but the toothbrush is not dirty. Most people will focus on the cleaning of nuclear carvings, but never clean the small brush used to brush them.
The small brush has accumulated a lot of dirty things over the years. Cleaning the nuclear carving with such a brush will draw many small marks on the surface of the nuclear carving for a long time. What's more, brushing the nuclear carving with a bristle toothbrush will seriously scratch the nuclear carving. After playing in the nuclear carving disc for a long time, scratches become inevitable and more and more.
Therefore, there must be many small scratches on the surface of the nuclear carving that really changes color with the hand board, and it is absolutely impossible to be as smooth as the nuclear carving that has just been polished by the machine.
7. See if the surface of the nuclear carving is bright. The color of the nuclear carving that really changes with the handboard is not only deeper, but more importantly, the nuclear carving will become translucent, like the feeling of agate stone, especially the protruding part of the nuclear carving surface, which is usually the most translucent part of the nuclear carving. However, the dyed nuclear carving is only uniform and dark in color, and there is absolutely no sense of penetration, and the color is lifeless.