False Flint Red

Another one

is the bottom of a modern Jingdezhen imitation Qianlong six-character seal script white glaze shallow bowl. We can clearly see that there are obvious traces of "flint red" on the exposed tire at the bottom of the bowl's footrim. This "flint red" mark is more natural and more likely to be taken seriously than the fake brush red. In fact, this is not the real Flintstone red, nor is the porcelain maker intentionally false Flintstone red, but the modern antique porcelain mat burning process caused by the phenomenon. In Jingdezhen has been the general use of gas kiln firing porcelain, without sagger, also do not use the traditional support in the past. Whenever the "full kiln" (i.e., load the kiln), the use of different sizes of pads to put the billet, adjust the kiln position, in order to make full use of the space and to ensure that the heat balance. In the use of mat board, to use pure porcelain clay (kaolin) slurry evenly brush coated board surface, to be very dry slurry placed in the kiln after the billet firing porcelain. This is to prevent the porcelain after firing with the mat board bonding. Ware into the kiln after removing the porcelain, the bottom will leave varying degrees of lemon color traces, deeper black and brown, light yellowish, and real flint red seems to be, we call it "porcelain clay remains". Although after high temperature, this clay remains also crystallized and porcelain tire fusion, but it is the same as into the "scattering effect" of the tire red the biggest difference is:

1, "scattering effect" of the tire red is escaping from the tire, so it is rooted in the tire glaze! Combined line; and the remains of porcelain clay is attached to the bottom of the exposed tire, its boundary with the tire glaze combined line is not connected.

2, tire red is pure ferrous oxide secondary oxides, was a beautiful orange-red or orange-yellow; and the remains of porcelain clay is all the complex composition of minerals within the sintered, and often directly sandwiched in the middle of the artifacts and cushions, resulting in a local temperature is low and did not complete the chemical changes, so that the color and the tire red is fundamentally different.

3, this difference is also manifested in the tire red once fired, although after hundreds of years and the beauty of the color unchanged, while the remains of porcelain clay out of the kiln may continue to carry out chemical changes, and often deepen the color.