We have been studying a new small sized, high processing speed full digital lab system. As a result, a magnificent color paper processor technology was developed for a compact, faster digital minilab by incorporating a submerged wiper-blade component system. This system has realized stable outstanding quality in faster processing time. In addition we are successful in improving printing quality not making any failure thanks to the development of down-flow circulation structure and conductivity sensor. This is our special submerged crossover technology for processing.