Modern on-glaze firewood combustion technology

Modern wood firing technology has evolved from Soviet firing and kiln firing. Combined with the previous techniques, there is a natural gray glaze phenomenon of "confusing the real with the fake". We know that there are two ignition methods:

A, gas kiln, wood burning method.

1, after the blank is completed, a layer of ground color is burned in the gas kiln and shaped;

2. After the temperature of the gas kiln reaches a certain temperature, putting firewood or charcoal will melt into glaze at high temperature and fall to the surface of the work, resulting in ash falling.

3. In the process of combustion, the temperature can also be controlled, so that it can withstand rapid cooling without bursting. Therefore, the burning time is not long, and it can be out of the kiln in two or three days;

4. According to different mud materials, the background color of imitation wood burning is also different, such as red and silver gray.

5. The characteristic of this burning method is that the texture like fire marks has appeared after gas burning, and there are only points on the work that are suspected of falling off when changing firewood, which are caused by spraying a little glaze during the low-temperature wood burning in the secondary burning;

As shown in the figure:

Second, the firing method of applying ground color first and then glazing.

1, before the firewood is burned, you can paint or glaze according to your own needs. The process of painting can control the color you like, but the glaze is different. Some effects after glazing will be produced in the firing process, which is also unpredictable, as shown in the figure:

2. After painting and glazing are dried, it can be fired in a kiln for two or three days. And sometimes in order to achieve the effect of rich glaze color, glaze spraying or color spraying will be carried out many times during the firing process;

3. Even works fired at low temperature will have a lot of bubbles if the glaze is combined with a small amount of falling ash, which can also show the texture of the rock and produce bright, matte and opaque effects. Relatively speaking, it will be more natural than the embodiment of gas burning wood and spraying color.

? Third, the characteristics of glaze firing

1. Most of them are fired at low temperature, so the green body is not porcelain, which has strong water absorption and is fragile, and can be smoked and burned to absorb carbon.

2, rapid reduction, not only makes the blank absorb carbon, showing a variety of black tones, but also sets off the glaze color more brightly. On the other hand, some metal oxides in the glaze powder are reduced to pure metal, and a shiny metal film is formed on the surface, which is quite glorious!

3, due to the rapid cooling, it is easy to cause the icing effect of glazed flour and fine cracks, which is also a good decorative effect.

4. In the preparation of glaze powder, lead or boron is often used as flux, which is a toxic heavy metal, so the fired utensils can not be used as utensils, and most of them are decorative works.

5. The time and degree of green body reduction are different, and the organic fuel in the barrel can also be replaced at will, so the combustion result is random, and it will be difficult to imitate and copy.

In fact, most glazed works are similar. Let's enjoy more glazed works!

1. The painting on the left is not glazed, and the painting on the right has been painted several times.

2. Appreciate the renderings of the work. First draw a red background and then draw a yellow glaze and other glaze colors.

3. Appreciate the effect of spraying red glaze, black glaze and yellow glaze.

Glazed works are mostly made by spraying glaze for many times, which is the colorful glaze we often see.

Well, after understanding the charm of glazed colored wood burning, in the next article, we will learn about the technology and works of Japanese pre-burning.