1, Usually a photosensitive shortening much heat type solid white oil light, first confirm whether you use white oil for thermosetting type white oil.
2, yellow reason please confirm oven temperature setting is reasonable, generally 145-150 degrees.
3, for the lost oil problem many factors, please confirm whether the reservoir under green white oil; If green is green oil reservoir in conjunction with the PCB board is not solid. Please note that if only controls the front cover of white oil green oil processing mill plate and washing cleanliness is OK. After pre-treatment to developing the non-more than four hours, otherwise the copper surface oxidation on the binding force of the ink.
