1. Bag material: how to distinguish the advantages and disadvantages of the bag in the aluminum foil box without odor. The bag with peculiar smell generally makes people feel that it does not meet the hygienic standard, and may affect the normal use of the bag. If there is no odor, it is necessary to check the transparency of the bag, whether the clarity is uniform, whether there is impurity feeling, etc.
2. Printing quality: see if there is an obvious third color at the joint of the two colors. The higher the fidelity level of the physical image, the better. See if there are wire drawing, fogging, blocking and missing printing.
3. Appearance uniformity: first observe the stiffness of the bag in the aluminum foil box. Generally, the higher the flatness, the better, except for the different needs of materials. For example, nylon and high-pressure film composite bag, the heat seal of the bag will be wavy; also need to observe whether the cut edge of the bag is neat, the more neat the better.
4. The firmness of the bag. The firmness of the bag in the aluminum foil box can be divided into two kinds of fitness and hot air firmness. Because of different material selection, the degree of firmness is also different. The most important way to distinguish the edge of the bag is to make sure that the edge of the bag is hard to be sealed by hand. Otherwise, it is not good. http://www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Aluminum foil packaging bags, mask bags, self-supporting zipper bags, eight side sealing bags, red wine bags, dog food bags, beverage bags, box bags, packaging roll film, perforated fruit bags, Dongguan bate packing material Co., Ltd.