The thing that presses the handprint is called inkpad. The main raw materials come from minerals, vegetable oils, plant fibers, natural spices, precision inspection, reasonable formula and hand-kneading. There are common cinnabar, vermilion and babao, etc. Inks have their own characteristics in formula and color.

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inkpad is an indispensable article in people's lives and a medium to convey art. Its quality directly affects the effect expressed by seal art. Good inkpad, red but not dry, quiet and elegant, delicate and heavy. In painting and calligraphy, Zhong is delicious, calm and three-dimensional. The longer the time, the brighter the color. Poor quality inkpad appears dull or shallow when it comes out, and some oil stains leach out, which makes the seal blurred.

People in ancient and modern painting and calligraphy attach great importance to good inkpad, and the inkpad selected for painting and calligraphy must be excellent. So as not to damage the beauty of the work and reduce the value of the work. This is also the reason why scholars prefer the eight-treasure inkpad.

People who make good use of inkpad choose inkpad, just as those who make good use of books choose pen and ink. Its quality directly affects its artistic effect. As the saying goes, a tiny difference is a thousand miles away. Therefore, when buying inkpad, it should be noted that the inkpad used in seal cutting or painting and calligraphy is not exempt from the inkpad sold by general stationery stores.

The inkpad sold in stationery stores is coarse in quality, heavy in oil and floating in color, so it cannot express the true face of the seal. In fact, it is not inkpad but can only be called inkpad. Therefore, it must not be used for printing samples or stamping calligraphy and painting.

a good inkpad is thick, bright and delicate, with bright and calm colors. At present, the inkpad made by Fujian Zhangzhou Babao Inpad Factory is the best, together with Xiling Inpad made by Hangzhou Xiling Inpad and Longquan Inpad made by Changzhou Jingyutang, it is called "the three major printing houses in China".

In addition, inkpad made by Suzhou Jiangsi Xutang, Huizhou Yishoutang and Beijing Rong Baozhai are also available. Nowadays, there are many kinds of inkpad sold by calligraphy and painting shops in the market, and the price ranges from 1 yuan 3 grams to hundreds of yuan 3 grams. However, as long as it is fine, thick and bright, bright and heavy in color and not oily, it can be used.