1. Why can Jianshui purple pottery be ground into a luminous effect?
The main reason is the clay. The clay of Jianshui purple pottery is usually more than 200 mesh, and even 380 mesh higher. It is very delicate. We often describe it as delicate as cream. It is because of this characteristic that Jianshui purple pottery clay can produce different brightness effects under the action of different grinding materials.
2. Why didn’t the polished purple pottery be polished?
This is a very important problem. It is worth saying a few more words. This is probably an important reason for the production of “Yin engraved and Yang filled”.
Jianshui purple pottery is a kind of literati pottery. Only by decorating literati’s calligraphy and painting, can it have its own personality and cultural charm.
Whether it is a traditional wood kiln or a modern gas kiln or an electric kiln, the surface of Jianshui purple pottery will form a layer of fire skin after being fired at high temperature, which is determined by the nature of the mud. This layer of fire is likely to cover the literati painting and calligraphy. When the craftsmen found out this problem, they naturally thought of grinding off the fire skin to let the painting and calligraphy show.
However, another problem arises again. Calligraphy and painting are only decorated on the surface with a pen, and the calligraphy and painting are also worn away at the same time. So is there a way: can be covered by the painting and calligraphy grinding out, but will not wear out the picture? “Yin carve Yang fill” is such a method.
Of course, this is just my speculation, but I would like to say that Jianshui purple pottery will develop and improve with time. Each craft of Jianshui purple pottery forms a complete and unique ceramic culture, and constantly enriches itself in the long river of time. Just like the common multi-color filling and ground mud color filling, which were not available more than 100 years ago.
3. What are the problems in the process of polishing?
First, it is easy to leave some trace of wiping silk on the surface of utensils. Wet towel dipped in emery, with the help of high-speed rotation of casting wheel, takes a lot of time to grind out the effect like mirror surface, and some trace of wiping silk is often inevitable.
Second, some complex color filling, the picture is very complex and subtle works, because the filling is very shallow, so when grinding into bright light, it is easy to wear off those shallow lines and damage the picture.