The pen washer is used to hold clean water when writing. You can buy it if you like it, but if it is just for washing pens, you can use bowls, cups, basins and other suitable utensils instead.
Brush wash has two purposes:
One is to add water to the ink to adjust the ink to a suitable level;
The second is to clean it after writing. The ink on the tip of the pen is cleaned and the brush is easy to preserve. Pen washing comes from pen washing and is named after its use.
Brush wash can moisturize the brush. In painting, many special effects using water are achieved by brush wash. Porcelain brush washers are the most handed down from generation to generation. The earliest works that can be seen are products from the five famous kilns of the Song Dynasty (Ge, Guan, Ru, Ding, and Jun). In addition to its use, the brush wash also has appreciation value for literati.
Extended information:
Brush washers are a kind of writing utensils besides the four treasures of writing: pen, ink, paper and inkstone. Brush washes come in many textures, including porcelain, jade, agate, enamel, ivory and rhinoceros horn, all of which are basically precious materials. Among various brush washers, the most common one is porcelain brush washers.
Various brush washes are not only colorful and full of interest, but also exquisite in craftsmanship and lifelike in image. As copywriting sketches, they are not only practical, but also can nourish the mood and cultivate sentiment. In ancient times, they were made of shells and jade; in the Song Dynasty, elegant porcelain brush washers were produced; in the Ming Dynasty, small bowls made of copper were also used as brush washers; in the past dynasties, they were mostly made of jade, pottery, etc., which were more colorful.
The basic shape of the brush wash basin is the alms bowl. Others include rectangular wash basins, jade ring wash basins, etc.
Baidu Encyclopedia - Pen Wash