The main use of wool felt is 1. Used for oil absorption, sound absorption, shock prevention and sound insulation of automobiles and locomotives. 2. Used in high-tech electronic products. 3. Used for mechanical equipment packaging. 4. Used for sound insulation of audio equipment. 5. Used in medical equipment. 7. Used in textile mills, chemical plants and cement plants. 8. Used for oil filtering and oil absorption. 9. Other musical instruments, hats and winter shoes can be polished and dustproof. Elastic, can foil rice paper, so that calligraphy and painting lovers can write freely and feel comfortable. When the work is full of ink, it won't run, and it has the function of supporting ink. Because wool can absorb moisture and ink, it greatly embodies the good performance of dehydration and ink retention, especially when painting Chinese paintings. Calligraphy and painting felt is economical, complete in grade, convenient and durable, and it is an essential auxiliary material in Four Treasures of the Study. Wool felt is a fabric with a long history. Its production method has been circulated in ancient Rome, and it is a well-known handicraft technology in Europe. There are many legends about the origin of wool felt, the most interesting of which is about Saint Clemente, the guardian of western shoes and hats merchants. Once, Sanclemente ran desperately in the Woods to avoid the enemy's pursuit, and his feet began to ache constantly, but he still tried to get rid of the enemy who was chasing him, so he found some wool in the Woods, stopped to collect it, wrapped the collected wool around his feet to relieve the pain, and then put his feet back in his shoes to continue running. When he finally reached a safe place, he took his sore feet out of his shoes and found that they had become a pair of felt shoes. Since then, wool felt has been widely used in religious ceremonies and has become a sacred product to exorcise demons and bring good luck. Later, people found that wool has excellent properties such as non-weaving, integral molding, warmth retention, water resistance, fire resistance, color fixation, heat insulation, etc., and began to use wool as a high-level manual art production material, thus making wool felt crafts enter the art palace. It can be said that people who have never played wool felt technology have been regarded as far away from the trend.