For customers and friends who have no experience in customizing plastic packaging bags, how to distinguish whether their customized packaging bags are qualified is a headache. Unqualified packaging bags may cause bad influence or irreparable loss to the brand and products, so this matter should be taken seriously.

Of course, the packaging bags produced by regular packaging manufacturers can be assured, regardless of the materials used or the quality of the packaging bags. As a manufacturer of packaging bags, here are some suggestions for you to teach you how to identify whether plastic packaging bags are qualified.

First, observe the color. Colored plastic bags cannot contain food that is directly ingested. The plastic bags that meet the hygienic standards are milky white or colorless and transparent. Plastic bags that do not meet the standards will appear in different colors such as yellow, red, and black. But some plastic bags made of waste plastic are also white.

Second, observe whether there are abnormal impurities in the plastic bag. The way to observe is to put the plastic bag under sunlight or light to see if there are black spots. If there are impurities, it may be made of waste plastic.

In addition, you have to smell it for any peculiar smell. Unqualified plastic bags are likely to use additives, which have various odors.

Of course, some plastic bags now do not have these logos, or the logos are printed on the outer packaging but not on the bag. We can judge whether a plastic shopping bag is qualified in the following ways:

Appearance: Visually inspect whether the printed patterns and characters on the plastic shopping bag are complete under natural light; open the bag and smell whether it has any peculiar smell.

Thickness: Thickness gauges and special measuring tools are required; according to national standards, the minimum thickness of plastic shopping bags is not less than 0.025mm.

Length and width: Measure the length and width of the plastic bag with a ruler (the accuracy of the ruler should be 1 mm).

In addition, we need to remind everyone that plastic bags used normally are non-toxic. If high-temperature food is packaged in plastic bags, toxic substances may be released, and long-term consumption is harmful to the body. For your health and environmental protection, please refuse to use inferior plastic bags.