... .save chemical Developer is used for circuit board, welding developing after exposure.1,Max developing size of PCB board:500*300mm 2 ... ,Developing method: Double-size spray 3,Developing speed:50s 4,Developing solution:8-10L 5,Spray head ... 8,Power supply: 220V 9,Dimension: 900*500*420mm PCB Developing machine PX300