Sukhothai-Si Satchanalai wares were well-known during the 14th to 16th centuries. Rang Kwien was the earliest shipwreck discovered with Si Satchanalai wares (Koh Noi products) followed by the subsequently discovered shipwrecks the Song Doc, Turiang and Maranei, which are all dated to the late 14th century. We can estimate that the dating of Mon, and Chalieng wares from the Koh Noi may be around the middle to late 14th century. Underglazed black wares from both important kilns were produced during the early 15th century. The Mingban was the crucial reason pormoting the export of Sukhothai-Si Satchanalai ceramics.