Traditionally the "four treasures of the study" are writing brushes, ink sticks, paper and ink stones because they are indispensable to any traditional Chinese scholar. Only through these four tools can the Chinese painter or calligrapher creates the beauty of Chinese art. As a result, much importance has been attached to the "four treasures of the study."

The Brush

                          

   The brush pen was invented very early in China's history. The use of brush pen dates back to at least three thousand years ago. The construction of brushes is adapted to a specific purpose such as painting or calligraphy and desired effect to be achieved such as clearly defined characters or blurred ones. Unlike conventional pens with a metal point, a brush pen is made from fine, soft animal hair. The resulting flexibility of the point of the brush pen is perhaps its most unique feature. A brush pen can be manipulated not only to the left and right on a two-dimensional plane, but can also be raised up and down, creating lines of varying thicknesses and endless variations. Many aspects of Chinese painting and calligraphy developed due to the special characteristics of the brush pen.
   Brush pens are classified by the type of hair used: goat hair, wolf hair, and purple hair. Wolf hair brushes are actually made from weasel hair and purple hair brushes from rabbit hair. Goat hair brushes are soft, flexible, and absorbent. Purple hair brushes produce bold lines and are best suited to calligraphy. Sometimes, to achieve a balance between steely and feathery lines, a brush that combines hair from two different types of animals is used. Not only is the handle made from bamboo, wood, lacquer, and porcelain, but also from precious materials including mother-of-pearl inlay, ivory, and jade. Usually, painters and calligraphers have several types of brushes on hand to adapt to individual purposes and preferences.

The Ink stick

                           
   The ink-stick is the pigment of Chinese traditional painting and calligraphy. Initially, natural ink or half-natural ink was generally used. Eventually, artificial ink appeared. The Ink stick is made from a mixture of soot and resin, molded into stick form. The three types of soot most commonly used pine, oil, and lacquer soot. A good ink stick is finely grained and has an even and smooth texture. It is firm and not sticky. It is pure, solid black in color, without murkiness or roughness.

Paper

                                  
   Paper was invented by a Chinese named Cai Lun around 105 A.D. Slowly, paper supplanted traditional bamboo slips and silk. Seven hundred years later, papermaking technology was absorbed by Islamic countries. Around the 13th century, paper began replacing papyrus and parchment in Europe.

The Ink stone

                          
   To use the traditional ink stick, an ink stone is required. As the name suggests, most ink stones are made of stone. The stone used must be of relatively fine whetstone materials so that the bristles of the brush pen are not damaged and to facilitate the grinding of the ink stick could. A little water is added to the ink stone, and the ink stick is ground. The result is that the ink and the ink stone act as an inkwell. Ink stones are extremely durable. In ancient times, artisans would have their names or other words engraved on their ink stones to be passed on to future generations.

Modernization
   While retaining the strengths of the traditional "four treasures of the study," modern technology and materials are being applied to make these treasures even more practical and suited to the needs of the user. The dependence of the Chinese arts of calligraphy and painting on this set of "treasures of the study" to express the ideas, writing system, experience, and feelings of the Chinese people has brought forth an eternal cultural institution. As a result, Chinese calligraphy and painting has sparked much interest and discussion in the international art world.
   For instance, recent research and development has created the possibility of manufacturing a fine quality of paper from pineapple leaf fiber pulp. Because it is soft and flexible, this type of handmade paper has an almost perfect degree of absorbency for brush-and-ink calligraphy and painting, so the art and the material combine to produce optimal results.