... panel making technology 2. Raw material (el phosphor, ITO film, Medium power Paste,Silver paste etc.) 3. KPT supply EL panel ... and EL panel making raw material (EL phosphor, ITO film, Medium power, Silver paste etc) . The special material developed by KPT ... kinds of EL display applied of the special material is Voltage 40V-400V, Frequency 50Hz-4KHz, Temperature from under zero 40 ...