How to check if the plastic bag meets the standard?

Nowadays, there are more and more plastic bags in our lives, and more and more people are not up to standard. Many people can't distinguish whether they meet the standards, but they are worried about their own safety. Below Jiuzhi Plastics Network Xiaobian introduces some inspection methods for everyone.
First, see if the ink is poisonous.
The ink selected in the plastic packaging bag during the printing process will also cause certain harm to the environment. Toxic inks will change color when exposed to oil. Therefore, it can be applied with oil at the time of purchase to see if it is safe to print.
Second, look at the bearing capacity of plastic bags
The state has regulations on the weight of plastic bags, and plastic bags must be able to withstand their own weight. The easiest way to test is to put in something that comes in, walk around the plastic bag and see how long the bag can last. If the bag with insufficient capacity is broken during use, the number of uses will increase and the waste will increase.
Third, observe after burning
After igniting the plastic bag and waiting for its fire to go out, observe whether there is black smoke, whether there is any irritating taste, and whether there is any black material left. If there is one that is made of waste, the damage to the human body is very large, and this is usually not up to standard.
Plastic bags that do not meet the standard are usually very harmful to the human body. Therefore, we need to know how to check the compliance to better protect ourselves.

Black Coating

Black coating is a type of Surface Treatment used to provide a durable, aesthetic and protective finish to metal parts. It is applied to a range of substrates, including steel, aluminum, and titanium, through various processes such as painting, chemical baths or physical deposition.


Black coating provides an attractive, matte finish that reduces glare and reflections. It is commonly used in industries such as automotive, aerospace, and firearms, where aesthetics and durability are essential. The black coating can also be used for functional purposes, such as to reduce friction and wear.


One of the most common types of black coating is black oxide. Black oxide is created through a controlled chemical reaction that forms a layer of black iron oxide on the surface of the metal. This process enhances the corrosion resistance of the substrate and provides a uniform and attractive black finish. Black oxide is also used to provide a matte black finish to gun parts, as well as to increase the conductivity of electrical components.


Another type of black coating is powder coating, which involves applying a dry powder to the surface of the substrate and baking it in an oven. This process creates a durable, weather-resistant finish that is resistant to damage from UV rays and other environmental factors. Powder coating is widely used in the automotive and manufacturing industries, where it provides a long-lasting, high-gloss black finish.


Finally, black coating can also be achieved through physical vapor deposition (PVD). This involves depositing a thin layer of black material onto the substrate through a vacuum chamber. PVD black coatings are very durable, and are often used in high-precision applications such as medical instruments and aerospace components.


In conclusion, black coating is a versatile and effective way to provide a durable, aesthetic, and protective finish to metal parts. Its visual appeal, corrosion resistance, and wear resistance make it a popular choice in a variety of industries and applications. Whether applied through chemical baths or physical vapor deposition, black coating plays an important role in enhancing the performance and longevity of metal parts.


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