-Lead sheets, dry film placed on the PCB and iron the heating roller machine.-Dry film all the long sides 2 sides.-Lead sheets to PCB exposures in radiotherapy machines by the film is placed on the PCB pad. -Then remove the clear plastic sheet overlay, and then came the exposure time is 30. Sec. -Bring the PCB in one phase and then lead Developer downy soft bristle toothbrush, rub so that are no longer required.-To wash with dishwashing liquid-PCB pads soaked in acid to bring copper parts that are no longer required.-To wash with water and wipe dry.
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