Bungard resin bonded paper photo resist pcb bungard 120306e50 the original bungard name represents the excellent quality and reliability of the materials and equipment used in producing circuit boards for prototypes and limited series production the special quality requirement in case of photo coated base material can be measured with the following facts the base material conforms to all international standards and releases as listed in summary in the standard ipc 4101 a the photo lacquer