Blue bricks are made of clay, which is the product of long-term weathering of some aluminosilicate minerals, and is named because of its strong viscosity. Clay is mixed with water to make bricks, and then calcined in a brick kiln (900℃- 1 100℃ for 8- 15 hours) to make bricks. Clay contains iron, and when it is completely oxidized during firing, iron oxide is red, which is the most commonly used red brick. However, if the iron in clay is not completely oxidized (Fe3O4) by cooling with water during firing, it will be blue, that is, blue bricks.

Strong air permeability, good water absorption, maintaining air humidity, wear resistance and non-rot. The blue brick is refined from natural clay, and the fired product is bluish black, with high density, good frost resistance, no deformation and no discoloration. Black, white and gray blue bricks are made of natural raw soil and fired without oxygen. Water is the spirit, fire is the strength, and the five elements are born together. They are warm in winter and cool in summer at home, which is healthy and environmentally friendly. Blue bricks contain trace sulfur, which can sterilize, balance chemical gases harmful to human body such as formaldehyde in decoration, and keep indoor air humidity. It has the characteristics of "breathability, water absorption, oxidation resistance and air purification" and has become one of the products strongly recommended by designers. This product has smooth surface, four corners at right angles, perfect structure, compression resistance and wear resistance, and is an ideal material for wall and pavement decoration of houses.

Strong plasticity, perfect spatial embodiment, inheriting the essence and surpassing the tradition, blue bricks give people a simple, elegant, calm, simple and quiet aesthetic feeling. In 2009, black, white and gray blue bricks were specially innovated, and a century-old series of blue bricks, light relief, high relief and modern machine-made bricks were launched. China's traditional allusions are the main artistic forms, with exquisite patterns, profound meanings and novel design techniques, which have absorbed the essence of China culture.

The art of blue bricks can not only decorate, but also inherit history. At the same time, it is also a work of art that is tasted and played with. The doctrine of the mean and the harmonious tradition are integrated into one, moistening things silently. Blue-gray is also the most rare quality of bricks, and the visible color changes: frequent caressing will absorb the body's gas, taste and liquid to moisturize, and it will be light when you step on it; Change naturally with water, simple and natural; Tea leaves are poured on it, such as brown color and tea fragrance; The embellishment of Danqing nourishes its artistic heart; Therefore, it is advocated to play with its collection, cultivate one's morality and cultivate one's nature to integrate its five elements and make everything one.