Technical exchanges: Doing a good job of controlling the quality of the base paper

It can be said that the base paper is the source of quality control of the product. Choosing the base paper that meets the requirements of the hygiene standards is of great significance to the quality of food packaging and the control of printing quality. According to the relevant requirements of the national food packaging paper hygiene standards, food packaging paper must not use waste paper and social recycled waste paper as raw materials; fluorescent brighteners or chemical auxiliaries that affect the human body must not be used. Raw paper sensory indicators require normal color, no smell and no dirt; physical and chemical indicators required for: lead (based on pb), mg/kg ≤ 5.0; arsenic (based on As), mg/kg ≤ 1.0; fluorescent substance 254nm And 365nm, should be qualified; decolorization test (water, n-hexane) should be negative; microbiological requirements: coliforms, a / 100g ≤ 30; pathogenic bacteria (intestinal pathogens, pathogenic cocci) There should not be. Therefore, after a correct understanding of the concept of food-grade base paper, it is necessary to carry out careful control over the standards and must not take it lightly.

In the case of export-oriented food packaging, the loss will be unimaginable once the health indicators are tested unqualified. Therefore, printers must be cautious when choosing food suppliers when they purchase food-grade raw paper, especially mass-produced food cartons. It is often said that reading is not enough. The original paper manufacturer can be first visited on site to see how its production environment, production capacity and quality control measures are. If the production environment is poor, equipment is outdated, and management and inspection measures are lagging behind, then it is good to let their propaganda say, and the quality of the product is hard to rest assured.

In addition to conducting on-site inspections, suppliers can also randomly sample and submit inspections on site, so that their quality assessments will be more accurate. After selecting the suppliers, they can conduct small-scale procurement trials, and then through sampling inspection to see if the product quality is stable, especially whether the various health indicators are controlled within the scope of the standard. In this way, the procurement control is strictly carried out according to the procedures. The standard of raw paper can be effectively controlled.