I don't know the details, but this is a solid ink stick I received from a calligraphy teacher. It's probably unused, but please check the condition in the images. The disposal information is based on an internet search, so please use it as a reference. This is an ink stick with the mark "Koukou" (回光). It is a tool used in calligraphy (one of the Four Treasures of the Study), made from ingredients such as soot (sumi), glue (nikawa), and fragrance. The item in the image is a product with "Shunkouen-sei" (春光園製) written on the box. Ink made in China is called "Touboku" (唐墨), and ink made in Japan is called "Waboku" (和墨), with different ingredient combinations and manufacturing methods. Ink that has dried over a long period of time is called "Koboku" (古墨) and is popular among collectors and calligraphers because of the beautiful changes in the ink color. ! Please check the condition carefully in the images! * This is a private seller. * Please check the condition carefully in the images. * Packing materials will be reused, and items will be packed simply by putting them in as is. Some items may be folded or packed tightly to make them smaller. * Basic simple packaging will be used. For items that may be damaged, you can request a change to your preferred packaging materials and a shipping method with compensation if you pay for the packing material costs and the difference in shipping fees. * AI input and voice input are used, so please be aware of any discrepancies with the images or errors in the text (please point them out as needed). * Please be sure to ask any questions you may have before purchasing.