The modern re-closable bags come in two main types – with zip locks and with adhesive strips. The choice of closure is a matter of taste.
Some people state that the bags with adhesive reseal straps are easier to use. Others say that zip locks help to protect the held items better. In this article, we will discuss the features that you can find for the bags of both types.
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The very first aspect to consider is the type of material used in the making of the bags. The most common types of plastics used for them are cellophane, polyethylene (LDPE, MDPE, and HDPE), and vinyl. Cellophane is too weak to protect the held items, but the re-closable bags made of this material are extremely lightweight.
The LDPE polythene can protect the held items from dirt, scratches, and moisture. The MDPE will additionally protect them from punctures and tears. The HDPE will protect them from all of the above, and more. However, if you want the utmost protection, you may want to consider the bags made of tough vinyl.
The next aspect is the color. Their color can vary in the entire spectrum, from black and white to pink and blue. Another factor to consider is the opacity, which can range from crystal-clear to completely opaque. It's important to keep in mind that the opacity of the material will go hand in hand with its durability.