Natural buffalo horn is the best scraping board, which is non-toxic and irritating to human body surface. Buffalo horn itself is Chinese medicine. Chemicals such as plastic plates should not be used to scrape the skin to prevent chemical stimulation from causing other diseases. Scraping boards made of metal, ceramics, jade and other materials are rarely used because they are easy to damage the skin, fragile and expensive. Scraping with metal hurts more. Suitable for people who have good tolerance to frequent scraping. Scraping with a metal scraper is easier than scraping with other scrapers. So it is ok to use copper scraper, but it varies from person to person.