First, acrylic keychain single and double appearance difference：
Acrylic key chain refers to the use of transparent acrylic material made of key chain, it can be divided into two kinds of single layer and double layer, of which the main difference between the single layer and double layer is the difference in appearance.
The single-layer acrylic keychain has a simple appearance, with only one layer of transparent acrylic plate, which can be put into the back plate printed with personal photos, logos and other designs, making it look more beautiful and fashionable.
The double-layer acrylic keychain is to add a layer of acrylic on the basis of a single layer, so that the appearance is more hierarchical, and the two patterns can be placed on the upper and lower layers respectively, so that the whole key chain is more textured.
Second, acrylic keychain single-layer and double-layer structure difference：
In addition to the difference in appearance, the acrylic keychain single layer and double layer are also different in structure. The single-layer acrylic keychain has only one layer of backplane and one layer of transparent acrylic plate, which has simple structure and relatively low price.
The double-layer acrylic keychain has two layers of transparent acrylic plate and a backplane, the structure is more complex, and the price is relatively high.
Three, acrylic key chain single and double price difference：
Because the single and double layers of acrylic keychains are different in structure and production process, their prices are also different. In general, the price of a double-layer acrylic keychain is higher than that of a single-layer acrylic keychain.
Four, acrylic keychain single-layer and double-layer production process difference：
The production process of acrylic key chain mainly includes inkjet technology, transfer technology and laser engraving technology. Inkjet technology and transfer technology are mainly suitable for single-layer acrylic key chain production, while laser engraving technology is mainly suitable for double-layer acrylic key chain production.
Laser engraving technology makes the double-layer acrylic keychain production more fine, can achieve a variety of complex patterns and text, its production process is more complex, so the price is also higher.
In short, acrylic key chain single layer and double layer are different in appearance, structure, price, production process, etc., you can choose your own key chain according to actual needs.