Crackle, while slightly opaque, is transparent enough for the fusion layer between the body and its glaze to remain visible where they blend together. Calcium serves as the main flux (or melting agent) for the glaze. During production, the excess calcium leads to several reactions: 1. As the glaze can sustain high heat during firing, our products can be thickly glazed without melting. 2. The glaze's surface is opaque. 3. During the intentionally slow cooling process, the excess calcium is crystallized and blended into the glaze. 4. Excess calcium in the glaze penetrates the body, forming the thick, smooth body-glaze fusion layer which covers the body completely. 5. Calcium-fired glaze (using calcium as a melting agent) shrinks and eventually becomes crackle.
Celadon is quite similar to Crackle. Originally, the element that brings about the green colour of this glaze is iron, due to the fact that the environment in the traditional kiln of the old days is one that lacks oxygen. In such conditions, iron gives rise to the colour green. Today, the environment within the modern kiln is filled with oxygen, and bronze thus replaces iron to produce this colour. In contrast with Crackle production, there is less calcium and a higher amount of potassium in the melting agent of Celadon in order to adjust its unique green colour, as the green in bronze is determined by its flux.
Floral White is relatively hard, as it contains aluminium oxide (Al2O3),
whose source is unrefined kaolin from Huế. The impurities in this kaolin result in the
rather opaque surface. A combination not very uniform, yet beautiful in our
contains aluminium oxide, yet in a more balanced combination compared to Floral
White. The ingredients are purer, making it smoother and shinier. We apply a thick layer of glaze,
preventing air bubbles to arise above and escape the surface. They remain
inside the glaze, making it slightly opaque. The opacity formed by air bubbles
is different from that by crystals in Crackles.
Black Bronze is the glaze of metal. Its foundation is certainly still
silica, yet on top of it, there is the silkiness of manganese and the iridescence
are created using metals, ceramic colouring and earth. - If there is some earth in the colour, metal will burn the glaze. This
burning, subjectively, could be viewed as beautiful. This is the case of Bat
Trang Blue on Crackles. - To minimize this burning, patterns are painted before being glazed. This
is the method to produce Floral White on Floral White. - The colours
green, red and yellow of Tricolour are required to be sharp, hence we mix in
some earth. - The colours of green, brownand
yellow of Autumn Tricolour need to have a transition in tone, and we add in more
earth to make them sink into the glaze.
blending is not present in porcelain. Porcelain production requires firing the
products before applying printed decorative patterns to be fired at a lower
heat. There is no interaction between colours and glaze