Since the domestic aluminum foil industry has just emerged in the domestic market, no unified industry norms and standards have yet been formed. Some manufacturers and wholesalers seek to make huge profits and shoddy, use paper to foil, lose weight, and cut corners. Therefore, when consumers purchase aluminum foil, they should not be confused by appearance or weight. They can be purchased by referring to the following methods:
A.. Look at the appearance: The regular manufacturer's packaging is generally professionally designed with registered trademarks, factory names, contact telephone numbers, precautions, and methods of use. It also indicates the length or weight, and the packaging is more exquisite. However, inferior products do not have these elements.
B. Looking at the endoplasmic reticulum: Most of the regular manufacturers of products businesses can open the endoplasmic reticulum, open the box check should pay attention to the following points:
1 See color: high-quality aluminum foil glossy as a mirror, the opposite side of the fog but fresh silver. The surface of inferior aluminum foil is relatively dim.
2 See the deterioration or not: open the seal to pull out more than 30 cm to see if there is oxidative deterioration, metamorphic aluminum foil oxidation will generate white-green aluminum oxide, because the light to see the surface of the front ring is not able to distinguish deterioration or not.
3 Look at the inner core: regular products will not be written on paper, but from the perspective of saving paper and transportation costs to design products, the inner core diameter of the paper tube is generally between 3.5-4.5 cm, the inner core wall thickness 1 Between -4 mm and the inferior product core paper tube is thick and large, the purpose is to replace the weight of the aluminum foil with the weight of the paper tube.
4 See whether the amount: the number of turns from the aluminum foil roll can basically determine whether the amount is sufficient, such as visually unsure, can be used after weighing the weight of the inner core paper tube to distinguish.
5 Look at the certificate: the regular manufacturers have the relevant departments of the inspection certificate and product quality certification, and the general three no products can not provide, check the authenticity of the certificate is more effective way is online query.
