Shenzhen Xinghongtai Tin Industry Co., Ltd. answers: In the process of using Xinghongtai tin bar, if it is found in the same degree of the case, the front and back solder joints are not the same, it depends on the furnace temperature is not enough, the use of flux is Which type (such as matting), and tin furnaces are not regularly cleaned.

For details, please contact Shenzhen Xinghongtai Tin Industry Co., Ltd., Tel: 400-9957-898