Custom Gusset bagscan be used in food packaging but must be tested for hygienic requirements of food packaging, including evaporated residues (acetic acid, ethanol, n-hexane), potassium permanganate consumption, heavy metals, and decolorization tests. The evaporative residue is a reflection of the possibility that custom gusset bags will precipitate residue and heavy metals when it encounters liquids such as vinegar, wine, oil, and so on, in addition, the residue will directly affect food color, aroma, taste and other edible quality. In addition, custom gusset bags are required to be biodegradable.

The different degradation types of products can be divided into photodegradation, biodegradation, and environmental degradation. The degradability reflects the ability of custom gusset bags to be accepted by the environment after the use of waste. If the degradability is good, the bags will break, differentiate and degrade by themselves under the joint action of sunlight and microorganisms, and eventually become detritus, accepted by the natural environment; if the degradation is not good will not be accepted by the environment, thus forming a “White pollution”.

Custom Gusset bags inspection projects fall into the following categories:

Custom Gusset bags shall have a flat appearance, free from scratches, Burns, air bubbles, oil breakage, and creases, and shall be heat-sealed in a flat, non-void manner. The film shall not have cracks, pores, and composite layer separation. No contamination such as impurities, foreign bodies, and oil stains. No peculiar smell, odor, turbidity, or discoloration shall be allowed.