1. The material of the bag:
It's essential for aluminum foil bags to be odorless. Bags that emit odd odors often make individuals question their hygiene levels, which can also interfere with their intended purpose. Apart from the smell, it's necessary to inspect the bag's transparency, ensuring that it's uniformly clear, free from impurities, and has a settled appearance.
2. Printing quality:
When examining the splicing of two colors, it's important to have a high level of fidelity on the physical map to identify any third color that may be present. Look for any issues such as drawing, fogging, blocking, or missing printing, as these can affect the accuracy of the map. It's essential to rearrange the content and ensure that the generated text is based on the original information, but take care to use a different style of language to avoid repeating the same wording.
3. The uniformity of the appearance:
When checking the quality of a bag, it's important to pay attention to its stiffness. Generally, a flatter bag is better, though there may be exceptions depending on the material. For instance, bags made of nylon and high-pressure film may have a wave-like shape at the heat-sealed part. Additionally, the trimming of the bag should be neat, and the neater it is, the better. So always take the time to observe these details when assessing the quality of a bag.
Bag firmness is a crucial factor to consider when shopping for bags. It can be classified into two categories: fit firmness and hot air firmness. The strength of a bag is determined by the materials used. To distinguish between the two, one can try tearing the edge of the bag by hand. If the bag is difficult to tear, then the heat seal is firm. However, if it tears easily, then it is not of good quality.