As to metal halide torch with gallium iodide is special rise 403nm and 417nm wave crest, and the highest wave crest 417nm has conspicuousness and good effect to exposal Diazo material.

• 至于钾掺合卤素灯，特别增强了403nm及417nm的波峰，其最高的417nm波峰对于Diazo 材料的曝光有十分显着及良好的作用.