Yin-Yang bags are also called visible bags. Their characteristics are that one side is a transparent film and the other side is an opaque film such as aluminized or aluminum foil. Due to the different effects on the front and back, the composite materials used are also different. The front of the Yin-Yang bag is mostly transparent, which has a good display effect on the packaged products. The back of the Yin-Yang bag is aluminized or aluminum foil structure, which can effectively resist the influence of external light on the product, and also has an excellent barrier packaging effect. It has the following advantages:
（1）Comes with easy-tear opening: can be sealed again with a sealing machine, strong sealing, easy-tear design, the bag is easier to open, saving time looking for a knife or scissors.
（2）Comes with self-sealing strip: reusable zipper sealing strip, good sealing, convenient sealing, easy to use.
（3）Thickened bottom: The thickened bottom design makes the product packaging bag have strong load-bearing capacity, and the bottom is not easy to fall off and is firm.
（4）Material safety: using environmentally friendly and safe new materials, brand new upgrade, easy to handle, food grade materials, suitable for all kinds of food packaging.