... °c Humidity 30% ~ 50%About UsGuangzhou Smarthand Technology Co., Ltd was established in 1999 and has our own R&D ... Our production is based on Guangzhou Kesong Magnetic Tape Co., Ltd. We offer a range of products, including hot ... smart cards, electronic tags, electronic parts & products, paper industry, etc. Now, we have developed into one of China ... melt adhesive film KH180 for Smart Cards industry