Beside the traditional decoration technique by brush, it appears recently the decoration technique using screen printing on rice paper. The new technique is applied mainly for the producing religious products like incense burners. But all other processes of making vessels are still very much handmade which is very important. There is another beautiful thing of Bát Tràng that is the old family houses. It is left only two or three this kind of old house which still keep the spirit of old Bat Trang, where it is found the big size vases, or bows with the decorations from the 14th century, the most popular period of Bat Trang Ceramics. Another impressive type of ceramics is found in Bat Trang during the Nguyen dynasty (1802-1945) is "gốm hoa nâu", brown patterned ceramics. It has a long history in Vietnam, appeared from the Ly dynasty (1010-1225). There are different techniques and products produced at different periods. During the Early Le dynasty (1428-1527), brown patterned was used with other colors. During the Mac dynasty (1527-1592), it was found majority on candle-holders and incense burners. During the Nguyen dynasty (1802-1954), it appeared on very fine Bat Trang flower pots. The trade in Vietnamese ceramics was damaged due to the plummet in trade by Cham merchants after the 1471 Vietnamese invasion of Champa. Vietnam's export of ceramics was also damaged by its internal civil war, the Portuguese and Spanish entry into the region and the Portuguese conquest of Malacca which caused an upset in the trading system, while the carracks ships in the Malacca to Macao trade run by the Portuguese docked at Brunei due to good relations between the Portuguese and Brunei after the Chinese permitted Macao to be leased to the Portuguese. Due to the so-called Nanban trade in the 16th-17th century, fragments of Vietnamese ceramic were found in a northern part of Kyūshū island. Among them was a wooden plate with character showing the date 1330 on it. Whether the Japanese went to Vietnam or Vietnamese traders came to Japan or if it all went through China is not quite clear. Vietnamese history records showed that when Lord Nguyễn Hoàng founded Hội An port at the beginning of the 17th century, hundreds of Japanese residents were already there. One of the more famous items is An'nan ware (安南焼), which was exported to Japan and used in Japanese tea ceremony although the high-footed bowls were originally used for food.