date:Jan 02, 2019
s to be processed through metal pipelines. Heavy metals contained in equipment or pipelines will be vaporized at high temperature, which will easily pollute food. In addition, if poor lead-containing ink is used in packaging bag printing, it is also easy to react with food, leading to lead leaching out of contaminated food. It should be pointed out that if enterprises strictly supervise and control industrial processes, their lead content can be controlled within the limits of national regulatio