Manufactured by a special process that controls the inclusions of oxides and metallic and non-metallic impurities, Kester Ultrapure(R) is the industry standard bar solder for use in high tech electronic applications where lower surface tension and hole filling ability are essential. The purity of kester Ultrapure(R) meets the requirements of IPC/J-STD-006B and will conform to these requirements when purchased directly or through stocking distributors.