... and Printing-F451, F452 coating machine. Now, we just import one production line for UV printing. 6. QC dept ... in 2005 -. Guangzhou Chumxin Metal Products Co., Ltd, set up in 2010 -. Guangzhou Chumboon Tinplate Trading Co., Ltd, set up in 2006 -. Tianjin ... Chumboon Iron-Printing & Tin-Making Co., Ltd, set up in 2010 ...